GetWindowDC twice

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- Previous
  - 1
    - template specialization bug Hello, I think I have found a template specialization bug in Microsoft Visual C++ 2003 (VC7.1). The following code compiles with gcc3.2 and Intel 8.0, but gives error C2764 "template parameter not used in partial specialization" with VC7.1. The workaround would be to repeat the complex type deduction done in DefinesAType for the specialization of SomeClass, which is code duplication and error-prone. //a class that has public typedef template < typename T > struct DefinesAType { //assembles in a complicated (assumed) //way a new type from T typedef T AType; }; //class SomeClass will be specialized template < class T> class SomeClass {}; //specialize on the type defined in DefinesAType template < class T > class SomeClass<typename DefinesAType<T>::AType> { }; int main() { SomeClass<int> sc; } Tag: GetWindowDC twice Tag: 226221
  - 2
    - delete this Hi all I'm developing a program with Visual C++ a I'm wondering if I can write this sentence in Visual C++: 'delete this'. The main objective of this sentence is to the delete the object that I'm in, does anyone know if this can cause some errors? Thanks Tag: GetWindowDC twice Tag: 226220
  - 3
    - CString mess HEAP in long running programs ? h i make heavy use of CString in database and communications routines in a large program that runs for months. will this eventually cause HEAP problems? thank a Tag: GetWindowDC twice Tag: 226218
  - 4
    - determining Windows version I need to know at run time if the operating system is Win95/98 or a WinNT variant. Any simple way to do that? Thanks. Tag: GetWindowDC twice Tag: 226216
  - 5
    - Identify user Hello, Given a process id, at kerner level can we identify who's the user who has the control over the process or who is running that process (or an application). I want to know this for win 98, XP and 2k and above. rgds Bmm Tag: GetWindowDC twice Tag: 226215
  - 6
    - <char*> data with process-to-process messages Hi there, I register a custom message with RegisterWindowMessage function. I would like to pass <char*> messages via the message: char buf[80]; .... // fill the buf with a message SendMessage( HWND_BROADCAST, MYMESSAGE, (WPARAM)buf, NULL ); this of course does not work as expected: the array is correctly received only in the process that sends the message. all other processes cannot see the message data (I suppose this is due to memory beeing virtually adressed in each process). my question is: how then should I declare the memory to be able to pass the data to another process as <char*>? I've tried to alloc the memory globally (via GlobalAlloc) and pass the pointer but with no result. The only solution I've found is to register the data as an atom (GlobalAddAtom) as pass the atom handle. This solution, however, does not look like a general one. thanks in advance for your help, Wiktor Zychla Tag: GetWindowDC twice Tag: 226206
  - 7
    - Dll exporting a function that creates MFC dialog is causing crash in MT. Hi I am facing a crash only in 2k with the following scenario . In XP and 98 this problem is not observed In my scenario I have X.exe, Y.dll. Y.dll exports a function (say Z) which has DoModal() of a dialog called. X.exe on click of a button starts a thread and in that thread calls the Z method which shows up a dialog. The problem happens when the button is clicked thrice or more than thrice. The three dialogs are lauched in three threads and are shown. But if I try to move the dialogs, After some time a crash is seen, whcih occurs in a method of MFC42.dll. More information about the scenario is X.exe links Y.dll statically. X links MFC as a shared dll, where as Y.dll links the same as a static dll. I suspected module state change when the the control is going out of thread boundary to Dll. But the exported function already has AFX_MANAGE_STATE(AfxGetStaticModuleState( )); as te first statement. Please let me know if any body faced the same problem before and point me towards the solution. Thanks Sre Tag: GetWindowDC twice Tag: 226202
  - 8
    - try block performance I have two pieces of code performing virtually the same task. While one of them (f1) is written in a try block, hoping to catch as many exceptions as possible, the other one (f2) is not: void f1 (void) { try { do_task1(); do_task2(); do_task3(); } catch (exception1){...} catch (exception2){...} ... } void f2 (void) { do_task1(); do_task2(); do_task3(); } Does f1 imposes any necessary runtime-overhead? Is to answer this question implementation dependent? And if so, is there a general answer applies to most implementations? ben Tag: GetWindowDC twice Tag: 226200
  - 9
    - Odd float C2092 compiler error VC++6 SP4 (I think SP4... how about listing SP level in Help/About, guys : Also compiler processor pack installed Anyhoo, just a small quirk with float initialization (maybe applies to other types too?) float a(1), b(2) int c(3) const float d((a + b)/float(c)); // error C2062: type 'float' unexpecte const float d((a + b)/c); // O const float d(a/float(c)); // O const float d = (a + b)/float(c); // O The first variant was the one I naturally used, and (IMHO) the most 'correct', and is the one that doesn't work... : Bil Tag: GetWindowDC twice Tag: 226199
  - 10
    - AfxBeginThread I have an ATL / MFC project which creates an ATL-based dialog box. When the dialog is created I want to spawn a worker thread. The code to create the thread is: DWORD dw; CWinThread* pThread = AfxBeginThread(SendFileFTP, (LPVOID) &dw); The thread proc is defined as this: UINT CUploadProgress::SendFileFTP(LPVOID pParam) { CProgressCtrl* pBar = (CProgressCtrl*) GetDlgItem(IDC_PROGRESS1); for(int x = 0; x <= 10; x++) { pBar->SetPos(x); } return 0; } But when I try to compile, it get this error message: error C2665: 'AfxBeginThread' : none of the 2 overloads can convert parameter 1 from type 'unsigned int (void *)' I suppose it's all very obvious, but could someone help me with this? What am I doing wrong? Thanks Tag: GetWindowDC twice Tag: 226194
  - 11
    - About setup.exe Respected Sir, How to create setp file in VC? Regards, Jitesh Tag: GetWindowDC twice Tag: 226191
  - 12
    - Generating ascii values Can anybody tell me what header files and function name do I need to get VC to generate the numerical ascii value of a given character? TIA. Tag: GetWindowDC twice Tag: 226187
  - 13
    - list-view: how to know if scroll-bars are being displayed Hello, is there a way of knowing (or being notified) if a list-view is displaying scroll bars (horizontal or vertical)??? I'd like to prevent horizontal scroll-bars from getting displayed resizing just before the list-view to prevent them from appearing, but this obviously requires knowing if they are being displayed. Bob Rock Tag: GetWindowDC twice Tag: 226186
  - 14
    - How check validity of BSTR? Hi, When a BSTR is passed is as a function parameter, how to test the validity of BSTR? In case of char* pointer we check whether it is NULL before using it. Is there a similar error checking mechanism for BSTR? I tried checking the lenght, but this is not the rightway, it hangs. I am using ATL, my function get called by ExOLEDB. Thanks Ramesh Tag: GetWindowDC twice Tag: 226183
  - 15
    - Re: sublass instance perhaps poor choice of wording on my part, but is there one instance of that fucntion? or one per each window subclassed? Tag: GetWindowDC twice Tag: 226182
  - 16
    - LNK2001 : unresolved external symbol "public: _thiscall trying to compile with vc++ 6.0, on windows xp, I doubled checked my project settings and options but can't understand why I'm getting the following errors : Linking . . . Server.obj : error LNK2001: unresolved external symbol "public: __ this call CallImpl(void)" (??0CallImpl@@QAE@XZ) Tag: GetWindowDC twice Tag: 226172
  - 17
    - vcvars32.bat not present after installing the Microsoft .NET SDK I am new to C++ and am trying to set up my machine to compile from the command line. The following program compiles and links: #include <stdio.h> main() { printf("This is my first C program.\n"); } This one doesn't: #define WIN32_LEAN_AND_MEAN #include <windows.h> #include <windowsx.h> int WINAPI WinMain(HINSTANCE hinstance, HINSTANCE hprevinstance, LPSTR lpcmdline, int ncmdshow) { MessageBoxA(NULL,"What's up, world!", "Windows PRogram", MB_OK); return(0); } Here's the error I'm getting when I compile the second program: C:\>cl winprog.c Microsoft (R) 32-bit C/C++ Standard Compiler Version 13.10.3077 for 80x86 Copyright (C) Microsoft Corporation 1984-2002. All rights reserved. winprog.c Microsoft (R) Incremental Linker Version 7.10.3077 Copyright (C) Microsoft Corporation. All rights reserved. /out:winprog.exe winprog.obj winprog.obj : error LNK2019: unresolved external symbol __imp__MessageBoxA@16 referenced in function _WinMain@16 winprog.exe : fatal error LNK1120: 1 unresolved externals From reading the documentation, it looks like I'm supposed to run a file named 'vcvars32.bat' to set up my enviromment. However, this file is not on my hard drive. I've uninstalled and reinstalled the SDK 3 times to make sure I'm not missing a setting, and the 'vcvars32.bat' file still is not on my machine. I have also loaded the Platform SDK. I am running Windows XP Home. Please help. Tag: GetWindowDC twice Tag: 226167
  - 18
    - Threads Hi, I want to create a thread and this thread should wait some messages and behave accordingly... Lets say I derived a class from CWinThread.. I think the execution point is determined by the function that will be passed as an argument to the AfxBeginThread function.. UINT MyThreadFunc(LPVOID lParam) CMyThread *myThread = (CMyThread *) AfxBeginThread(MyThreadFunc,NULL, THREAD_PRIORITY_NORMAL,0,0); Now I want to post some messages to myThread by PostThreadMessage.. I have already defined message handlers for some user messages #define WM_USER_THREAD_UPDATE_PROGRESS (WM_USER+0x102) ON_MESSAGE(WM_USER_THREAD_UPDATE_PROGRESS, OnThreadUpdateProgress) it seems I will handle this messages into MyThreadFunc with GetMessage and PeekMessage and after TranslateMessage and DispatchMessage OR this messages will come to the PreTranslateMessage of CMyThread..(?) if I will handle messages in MyThreadFunc then the function will look like this.. UINT MyThreadFunc(LPVOID lParam) { while (GetMessage(...)) { //if message is destroy thread, then quit.. //else TranslateMessage(...) DispatchMessage(...) } } the syntax may not be correct.. but whose message pump GetMessage function gets messages? I mean if I had two thread with the same function, what will happen? I hope I can explain what i thought:) if preTranslateMessage gets the messages, the there will not need for MyThreadFunc, so it should wait until the thread is terminated???! Please tell me I am wrong or not.. Thanks anyway.. Tag: GetWindowDC twice Tag: 226166
  - 19
    - How to launch an Executable from within memory Hi All , I am writing a program that inputs an executable ,compresses it and outputs an exe in which the input compressed exe has been packed.The Output exe when executed , is supposed to uncompress the original exe and then Launch this exe from memory without writing it to the disk. Can anybody help me as to how to launch an exe that has been read into a memory buffer...? Thanks Jeffrey Tag: GetWindowDC twice Tag: 226162
  - 20
    - UNICODE vs _UNICODE First off, how come there is both a _UNICODE and UNICODE symbol used in the Win32 API? Second off, what is the distinction, if any? I've noticed that for builds to work w/o errors, I need to either have both defined or neither. So, anyone feeling descriptive? I'd really like to know which I should officially be using in code where I need to detect whether building with or w/o it (i.e. #ifdef UNICODE vs #ifdef _UNICODE). Thanks. -- Kendall Gifford ======================================== WEB: http://kendall.jedis.com/ EMAIL: [REPLY TO NEWSGROUP PLEASE] ======================================== Tag: GetWindowDC twice Tag: 226159
  - 21
    - Inline methods Hi all, I have always defined inline methods for a class in a header file (either the header in which the method was declared, or in a separate one for the sake of more readable library headers). So I would end up with something like: ////// some_class.h ////// class SomeClass { void someInlineMethod() { // Do stuff } void someNormalMethod(); }; ////// some_class.cpp ////// #include "some_class.h" void SomeClass::someNormalMethod() { // Do more stuff } A while back, I came across some C++ code specifically for MSVC that actually defined methods in the .cpp file as inline, like so: ////// some_class.h ////// class SomeClass { void someInlineMethod(); void someNormalMethod(); }; ////// some_class.cpp ////// #include "some_class.h" inline void SomeClass::someInlineMethod() { // Do stuff } void SomeClass::someNormalMethod() { // Do more stuff } When I try to do this in MSVC.Net, I sometimes get a linking error saying something to the effect that the linker cannot find the method that I declared as inline (sorry, I don't have the exact error message in front of me). Other times, it works fine, although I don't know for sure that the method is actually being inlined. Can anyone shed some light as to the true way to define inline methods, preferrably in a platform-independent sort of way? Dave Tag: GetWindowDC twice Tag: 226158
  - 22
    - Create() Not sure if this is the place for this question but it is as good a place as any. I have a multi-threaded application (up to 65 worker threads). I was wondering how to debug my problem. when I do the following from the masterthread(called from timer interrupt) everything works ok, however if I try it in my worker thread(trying to speed up the code execution) I get an Access Violation exception thrown. Code: CMyClient m_client; //Create an instance here if (!m_client.Create()) This is where I get the error. { ... } else { ... } the CMyClient.h file contains class CMyClient : public CSocke {... Can I not use the Create() function from a worker thread, or does it need some privlages first ?? Thanks in advance. Tag: GetWindowDC twice Tag: 226154
  - 23
    - Same Window: ShellExecuteEx and Wait I am writing a command line utility that launches other command line utilities. The problem is that if I use ShellExecuteEx and WaitForSingleObject the program creates a new window and all the output from the child process is lost when the window is closed. Is there a way to launch and wait for a program so the output is on the same window? Tag: GetWindowDC twice Tag: 226152
  - 24
    - Version Number Format Okay, I know that Microsoft, as a standard, uses the following format for version numbers (dotted quad notation): Major.Minor.Build.Revision (example 1.15.0015.0) Also, I know that often this version information is stored in a binary form in a double word, such as a REG_DWORD in the system registry. So, I have a helper class that reads either DWORDs or string representations of a version number and then provides checked access to either one of the four fields, Major, Minor, Build, or Revision, and finally allows you to read the whole version number as a string or DWORD. This is so that I can easily read in version info as a DWORD or string from the registry or a file and then do comparisons. To finalize everything, I'd like to make sure that I'm packing/unpacking my four fields into and out of the DWORD correctly. Does anyone know Microsoft's format? I know Build needs least 12 bits (from some version numbers I've seen) but I'm not sure on others. Any help appreciated. Thanks. -- Kendall Gifford ======================================== WEB: http://kendall.jedis.com/ EMAIL: [REPLY TO NEWSGROUP PLEASE] ======================================== Tag: GetWindowDC twice Tag: 226151
  - 25
    - sublass instance i subclass three windows from another app with my own function in a hook (function is called MySpecialProc. question: is there just one instance of MySpecialProc? i believe this to be the case...or does windows do any spawning for each instance of each window i subclass? Tag: GetWindowDC twice Tag: 226145
- Next
  - 1
    - VC++ book/site recommendations Hi, Can anyone recommend some books or sites for a newbie for : *C++ programming *C++ windows programming My programming experience is 5 yrs in Delphi. Thank you in advance, Steve-O Tag: GetWindowDC twice Tag: 226142
  - 2
    - need help using GetAsyncKeyState() I'm making an application plugin and I need to be able to detect if certain keys are pressed. I've included window.h and am using methods declared in it fine IE: OutputDebugString() when I add this code: if ( GetAsyncKeyStfate(10) & 0x8000 ) { // virtual key is down MSGBOXINFO("Key pressed"); } I get linker errors about unresolved external symbol __imp__GetAsyncKeyState@4 I'm not sure what I need to do about this, I can see if it was an undeclared identifier error, but missing symbol? Any ideas? Thanks- Steve Tag: GetWindowDC twice Tag: 226141
  - 3
    - stopping WM_DESTROY i am subclassing a window....what can i do to stop the WM_DESTROY? return 1? is that safe? thanks ahead daniel Tag: GetWindowDC twice Tag: 226140
  - 4
    - Linking vith visual c++ 6.0 Hello. How to when linking IDE himself to include nessery lib files?? Dem Tag: GetWindowDC twice Tag: 226137
  - 5
    - Know Disk Type? HELP! I am working with Windows 2000 software RAID (-0) with 3ware RAID card to implement a hot swap capability. Now As a new disk is inserted, I will have to check the status of the disk, such as "Dynamic Disk""Basic Disk""Offline""Online" and so on. Of course I use SetupDi command to disable or enable disk drives during this process. Can anyone tell me how I can know such state or type of disks, currently I am interested in Disk 1 and 2. Thank you in advance. Mark T Tag: GetWindowDC twice Tag: 226133
  - 6
    - Array of function pointer that points to return ... Suppose I have : void f1() { TRACE("f1\n"); }; void f2() { TRACE("f2\n"); }; void Dummy() { return; } void (*f[3]) (); f[0] = f1; f[1] = f2; f[2] = Dummy; I want the f[2] call to be a return (call do nothing). Is there a way to make this without defining a Dummy function that just return. Something like f[2] = void (*) () return; Tag: GetWindowDC twice Tag: 226128
  - 7
    - Regarding SerializeElements and byte swapping Hi, This is regarding SerializeElements. SerializeElements does a bit-wise read or write of the elements if (ar.IsStoring()) ar.Write((void*)pElements, nCount * sizeof(TYPE)); else ar.Read((void*)pElements, nCount * sizeof(TYPE)); Does this(bit-wise read/write) eliminate endian issues. I mean if I store ints in a container, serialize it and send it across the n/w(to a big endian env); would there be endian issues; would I have to do byte swapping? I heard that the stream operators >> and << do byte swapping internally. Kindly help. Thanks and Regards, M Shetty Tag: GetWindowDC twice Tag: 226126
  - 8
    - clock_t clock(void); Good day all I need to benchmark some code on different machines, and compare their performance to the same routines run on an FPGA. What I use currently is the above routine (clock_t clock(void);) within a MFC framework. My question: Does the above routine return the exact amount of time required by the routine to complete by accessing an onboard clock? Should I try to get access to an onboard processor realtime clock? Any suggestions Thank you Tag: GetWindowDC twice Tag: 226124
  - 9
    - graphics How to open full screen window without visible standard ( minimize, maximize, close ) controls for displaying graphics? Dem Tag: GetWindowDC twice Tag: 226117
  - 10
    - recommended methode for allocating dynamic memory Hello everybody! what is the recommended methode for dynamically allocating memory? I plan to release it in the class-destructor. Thanks & Regards Tag: GetWindowDC twice Tag: 226114
  - 11
    - error LNK2005: _DllMain@12 already defined Hi I have a MFC dll that has a method that takes CString as parameter. If i include that in a ATL dll and compile it , it give a compilation error saying "Undeclared Identified CString". So i included Afxwin.h in the StdAfx.h of the ATL dll and then included my header file. But now when i compile it . it throws a linker error error LNK2005: _DllMain@12 already defined What is the problem. How to include a MFC dll inside a ATL dll . Can anybody help me?? Tag: GetWindowDC twice Tag: 226111
  - 12
    - SysListView32 Greetings, I'm using VC++. I would like to create a listview on my main window. I tried using the following code, but CreateWindowEx returned zero: hWnd2 = CreateWindowEx(0x200, "SysListView32", "", 0x50000001, 10, 10, 200, 200, hWnd, NULL, hInst, NULL); If I replace "SysListView32" with "button", a button will be created. So you can be sure that all my other code and the variables are fine. What is wrong with my code? Is there a non-mfc vc++ tutorial on the Internet? Thanx in advance... Simon Tag: GetWindowDC twice Tag: 226106
  - 13
    - Idle Hi All, I was looking for mouse and keyboard idleness. First I thought that I must take help of hooks then i found a api GetLastInputInfo(..). But the problem is that this api code does not compile. I am on Win2k. According to msdn it must work but it is not. What wrong i might have done? Any idea Tag: GetWindowDC twice Tag: 226104
  - 14
    - Compile for different platforms I want to include SNMP support in my program, it requires mgmtapi.lib and snmpapi.lib, they only works in Windows2000/XP. I can use GetVersionEx() to determine target OS at run time and enable/disable SNMP support accordingly, however, it's more than that, the program can't even run in Windows98. How do I link the libraries in such a way that the program doesn't error out when run on unsupported OS? Tag: GetWindowDC twice Tag: 226101
  - 15
    - Window handle from a console app Hi, Does anyone know how can a console app get a handle to its console window? Thanks, Nick Tag: GetWindowDC twice Tag: 226090
  - 16
    - About data type conversion Respected Sir, How toconvert one type of value into another type in VC? Basically I want to convert Long to char *. Regards, Jitesh Tag: GetWindowDC twice Tag: 226088
  - 17
    - Sharing a COM object in a MMF Is it possible to share access to a COM object in a dll across multiple processes. Does anyone know where I can find any examples of this Thanks Steven Tag: GetWindowDC twice Tag: 226087
  - 18
    - Class Templates problems Hi lets say i have a vector of class template: vector<CTask<CSomeClass> > m_vTasks; template <class T> class CTask { public: CTask() : m_p(NULL){} CTask(const T& t) : m_p(&t){} ~CTask() { m_p(NULL); } void Execute() { if(m_taskType==0) m_p->MethodA(); else if(m_taskType==1) m_p->MethodB(); } UINT m_taskType; T* m_p; }; Basicaly, id like to have m_p->Method(A-B)(); call within the scope of an existing class. Obviously, CSomeClass defines both MethodA() and MethodB() functions. Also, There is only one instance of CSomeClass created and all items in the vector, will point to this class using : (within CSomeClass's scope ) ... m_vTasks[0].m_p = this; m_vTasks[1].m_p = this; ... Can this work, and if so, is CTask declared properly ? thanks a lot Tag: GetWindowDC twice Tag: 226086
  - 19
    - multithreaded - Thread / Threads - hang / freeze - on AfxBeginThread I have made a thread previously over this issue, but wanted to bring attention to it again and start fresh so that I donâ??t make any assumptions I have an application that communicates to the user through RF devices (telnet). Constraints placed upon the application required it to be written in two pieces 1) One piece is a VB application that communicates with the RF devices through winsock controls. This application acts as a gateway between the RF devices and the actual application where most of the process occurs 2) The other piece is a multithreaded MFC VC++ application without an interface that runs as a process. This is where most processing occurs. For each RF device connected and needing to run, a new thread is created that communicates to the RF device through the VB app via the shared named pipe The main communications loop in the VC++ application is WatchPipe. Watch pipe creates new threads when needed and communicates with existing threads accordingly All that to get to the problem The problem is eventually and by all appearances as a random act, when WatchPipe creates a new thread it sometimes hangs and never returns The function to launch the new thread is bool LaunchProcess(CThreadState * ThreadState char *ProcedureName = "TL_RF.LaunchProcess" bool Launched = true CLogIt Logit( ProcedureName, ThreadState ) // I never actually use ThreadState->WinThread (should I ? ThreadState->WinThread = AfxBeginThread( ThreadedFunctionLauncher, ThreadState, THREAD_PRIORITY_NORMAL, 0, CREATE_SUSPENDED, NULL ) ThreadState->WinThread->m_bAutoDelete = false ThreadState->WinThread->ResumeThread() return( Launched ) The first parameter in AfxBeginThread i (AFX_THREADPROC pfnThreadProc) Points to the controlling function for the worker thread That function (chopped down) looks like thi UINT ThreadedFunctionLauncher( LPVOID pThreadState CThreadState * ThreadState ThreadState = (CThreadState *)pThreadState char *ProcedureName = "TL_RF.ThreadedFunctionLauncher" CLogIt Logit( ProcedureName, ThreadState ) ThreadState->SendResponseToTLRF( "Entering thread" ) tr /* Do stuff here * catch( _com_error &e HandleCOMError( ProcedureName, e, ThreadState ) } catch( exception * e SendErrorToDevice( ThreadState, ProcedureName, e ) catch( CException * e SendErrorToDevice( ThreadState, ProcedureName, e ) ThreadState->SendResponseToTLRF( "Exiting thread" ) EndAction(ThreadState) Logit.Log( "Exiting" ) return( 0 ) The program seems to hang on the AfxBeginThread call in LaunchProcess The way I see the hang is through the log files that are being generated by the CLogIt Logit( ProcedureName, ThreadState ) Line in each function The ClogIt class logs an â??enteringâ?? line on itâ??s constructor, and an â??exitingâ?? line on its destructor When the program hangs we have logged that we have entered into the routine, but there is no entry in the log to support this routine ever returned An example log for a successful previous call looks like this 02/09/2004 12:06:24 - 127.0.0.1 TL_RF.LaunchProcess Enterin 02/09/2004 12:06:24 - 127.0.0.1 TL_RF.LaunchProcess Exitin 02/09/2004 12:06:24 - 127.0.0.1 TL_RF.ThreadedFunctionLauncher Enterin The last entry in our logs after the application has hung show 02/09/2004 12:13:37 - 10.20.155.1 TL_RF.LaunchProcess Enterin with no additional entries I can verify that the application is still running, and I can verify that the main thread for communication is in fact hung Also, this is running on a dual processor machine hosting terminal services. (The problem doesnâ??t seem to occur on a single processor machine) ************************* System Informatio ************************* Database: SQL Server using ODB Item Valu OS Name Microsoft Windows 2000 Serve Version 5.0.2195 Service Pack 4 Build 219 System Manufacturer H System Model ProLiant DL380 G System Type X86-based P Processor x86 Family 15 Model 2 Stepping 7 GenuineIntel ~2787 Mh Processor x86 Family 15 Model 2 Stepping 9 GenuineIntel ~2787 Mh BIOS Version 07/25/03 Total Physical Memory 1,048,084 KB Available Physical Memory 11,728 KB Total Virtual Memory 3,570,232 KB Available Virtual Memory 1,295,424 KB Page File Space 2,522,148 KB Tag: GetWindowDC twice Tag: 226084
  - 20
    - Disk Management API HELP! A few days ago, I got a help on APIs to do the Device Manager job. Now I am a bit in trouble. Without using a Windows GUI, I need to do the followings. Can SetupDiXXXX allows me to do it? # Reactivate "Disk 1" shown in the Disk Management after enabling Disk 1 using SetupDiXXXX. Just as a note, my application is a kind of an "embedded system" and there is not GUI to the user. Thus I have to manipulate the contents of the Disk Manager just with Windows APIs, meaning that without opening those control windows. I will be looking forward to hearing from anyone for the help! Thank you in advance. Mark T. Tag: GetWindowDC twice Tag: 226083
  - 21
    - "enum" in a class: Is it statically available? Hi! Probably a stupid question, but: Do I need to declare an "enum" static for it to always be available from a class? Like this: class Canvas { public: static enum STATE <--- Is static necessary here, or is an enum considered a constant? { STATE_ALPHABLENDING, STATE_AUTOINVALIDATE, STATE_CREATED }; ... I probably could have tested it, but I just don't care to create a special program for such testing when there is guaranteed to be someone out there who already know... With regards, Morten Tag: GetWindowDC twice Tag: 226077
  - 22
    - newb memcpy() ? HI- I saw somewhere in someone else's code they used memcpy() to copy an array to another array. I just added this to my code and I thought I would make sure that it was OK to use memcpy() with a new'ed pointer. For example int* pInt = new int[20]; for(int i=0; i<20; i++) *pInt[i] = i; int* pInt2 = new int[20]; memcpy(pInt2, pInt, sizeof(int)*20); That is ok, right? Or do I need to use memset() I can't keep the restrictions of the different memory tools straight for some reason, the only thing I know is that you can't use free() w/ new :) Any help would be appreciated, thanks! Steve Tag: GetWindowDC twice Tag: 226069
  - 23
    - Screen Saver Linking I'm have a problem linking my screen saver project. I get the following errors scrnsave.lib(scrnsave.obj) : error LNK2001: unresolved external symbol _ScreenSaverProc@1 scrnsave.lib(scrnsave.obj) : error LNK2001: unresolved external symbol _ScreenSaverConfigureDialog@1 I have these functions defined in "french saver.cpp". Any ideas what I'm doing wrong I'm using VC 6.0 on XP Tag: GetWindowDC twice Tag: 226062
  - 24
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Hi

Is it ok to call GetWindowDC twice on the same window before ReleaseDC ?

HDC dc1 = GetWindow(hWin1);
HDC dc2 = GetWindow(hWin1);
...
ReleaseDC(hWin1, dc2);
ReleaseDC(hWin1, dc1);

I usualy only do it once but I noticed that sometimes my drawings
calls generate a WM_PAINT message and then id get BeginPaint
EndPaint which pretty much does get/release of dcs.

thanks a lot.

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Re: GetWindowDC twice by David

David
Tue Mar 02 11:21:06 CST 2004

>Is it ok to call GetWindowDC twice on the same window before ReleaseDC ?

I don't see why you shouldn't - presumably you've tried it?

Dave
--
MVP VC++ FAQ: http://www.mvps.org/vcfaq

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Re: GetWindowDC twice by a

a
Tue Mar 02 17:03:34 CST 2004

"David Lowndes" <davidl@example.invalid> wrote in message
news:jig940h3lutp2g0mr3qth93o3eddsbcu48@4ax.com...
> >Is it ok to call GetWindowDC twice on the same window before ReleaseDC ?
>
> I don't see why you shouldn't - presumably you've tried it?
>
> Dave
> --
> MVP VC++ FAQ: http://www.mvps.org/vcfaq

I was actualy having all kinds of problems because i called ReleaseDC
needlessly. But now everything seems ok. I just wasnt sure. Thats why
i asked .

thanks

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