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VS compiler error???

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VS compiler error???

Mar 30th, 2007

I have this code (example)

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const char g_sz_className[] = "myWindowClass";
 
LRESULT CALLBACK WndProc(HWND hwnd, UNIT msg,WPARAM wParam, LPARAM lPraram)
{
    switch(msg)
    {
    case WM_CLOSE:
        DestroyWindow(hwnd);
        break;
    case WM_DESTROY:
        PostQuitMessage;
        break;
    default:
        return DefWindowProc(hwnd, msg, wParam, lParam);
    }
    return 0;
}
 
int WINAPI WinMain(HISTANCE hIstance, HISTANCE hPrevIstance, LPSTR lpCmdLine, int nShowCmd)
{
 
    WNDCLASSEX wc;
    HWND hwnd;
    MSG Msg;
 
    wc.cbSize = sizeof(WNDCLASSEX);
    wc.style = 0;
    wc.cbClsExtra = 0;
    wc.cbWndExtra = 0;
    wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
    wc.hInstance = hIstance;
    wc.hbrBackground = (HBRUSH) 13;
    wc.lpfnWndProc = WndProc;
    wc.lpszClassName = g_sz_className;
    wc.lpszMenuName = NULL; //change
 
    if(!RegisterClassEx)
    {
        MessageBox(NULL, "Err", "ERR", MB_OK | MB_EXCLAMATION);
        return 0;
    }
 
    hwnd = CreateWindowEx(
WS_EX_CLIENTEDGE,
g_sz_className,
"My  app",
WS_OVERLAPPEDWINDOW,
CW_USERDEFAULT,
CW_USERDEFAULT,
600,
650,
NULL,NULL, hIstance, NULL);
 
    if(hwnd = NULL)
    {
        MessageBox(NULL,"ERROr", "HWND ERR", MB_OK | MB_ICONEXCLAMATION);
        return 0;
    }
 
    ShowWindow(hwnd, nCmdShow);
    UpdateWindow(hwnd);
 
    while(GetMessage(&Msg, NULL, 0, 0) > 0)
    {
        TranslateMessage(&Msg);
        DispatchMessage(&Msg);
    }
 
    return Msg.wParam;
 
 
 
}
const char g_sz_className[] = "myWindowClass";

LRESULT CALLBACK WndProc(HWND hwnd, UNIT msg,WPARAM wParam, LPARAM lPraram)
{
    switch(msg)
    {
    case WM_CLOSE:
        DestroyWindow(hwnd);
        break;
    case WM_DESTROY:
        PostQuitMessage;
        break;
    default:
        return DefWindowProc(hwnd, msg, wParam, lParam);
    }
    return 0;
}

int WINAPI WinMain(HISTANCE hIstance, HISTANCE hPrevIstance, LPSTR lpCmdLine, int nShowCmd)
{

    WNDCLASSEX wc;
    HWND hwnd;
    MSG Msg;

    wc.cbSize = sizeof(WNDCLASSEX);
    wc.style = 0;
    wc.cbClsExtra = 0;
    wc.cbWndExtra = 0;
    wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
    wc.hInstance = hIstance;
    wc.hbrBackground = (HBRUSH) 13;
    wc.lpfnWndProc = WndProc;
    wc.lpszClassName = g_sz_className;
    wc.lpszMenuName = NULL; //change

    if(!RegisterClassEx)
    {
        MessageBox(NULL, "Err", "ERR", MB_OK | MB_EXCLAMATION);
        return 0;
    }

    hwnd = CreateWindowEx(
WS_EX_CLIENTEDGE,
g_sz_className,
"My  app",
WS_OVERLAPPEDWINDOW,
CW_USERDEFAULT,
CW_USERDEFAULT,
600,
650,
NULL,NULL, hIstance, NULL);

    if(hwnd = NULL)
    {
        MessageBox(NULL,"ERROr", "HWND ERR", MB_OK | MB_ICONEXCLAMATION);
        return 0;
    }

    ShowWindow(hwnd, nCmdShow);
    UpdateWindow(hwnd);

    while(GetMessage(&Msg, NULL, 0, 0) > 0)
    {
        TranslateMessage(&Msg);
        DispatchMessage(&Msg);
    }

    return Msg.wParam;



}

But it looks like its not portable.

Now in Visual Studio I cannot compile that. There is a bit more complicated file with stdfax.cpp, stdfax.h, resouurce.h files. What should I do?

Where can I get a good tutorial which will teach me Win32 API as Visual Studio wants???

Thanks in advance,

Jan

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Re: VS compiler error???

Mar 30th, 2007

Where can I get a good tutorial or book which will teach me Win32 API as Visual Studio wants???

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Re: VS compiler error???

Mar 30th, 2007

>>But it looks like its not portable
Of course not -- its only for MS-Windows

Tutorial here

Last edited by Ancient Dragon; Mar 30th, 2007 at 4:18 pm.

Don't PM me with questions -- you might get a nasty PM in response. If you have a question then post it in one of the forums.

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Re: VS compiler error???

Mar 30th, 2007

sorry, but I am affraid this damn code is from link you just gave me...

Is there any good book?

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Re: VS compiler error???

Mar 30th, 2007

> PostQuitMessage;
Maybe if this were a function call, say
PostQuitMessage(0);

Perhaps posting actual error messages instead of "it doesn't work" would help as well.

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Re: VS compiler error???

Mar 30th, 2007

h I am so sorry,

I was in hurry when writing that code and it is full od bugs...

Sorry

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Re: VS compiler error???

Mar 30th, 2007

•

Originally Posted by jan1024188

sorry, but I am affraid this damn code is from link you just gave me...

Is there any good book?

The code in that link is perfect -- billions of people (:eek: ) have used it.

Don't PM me with questions -- you might get a nasty PM in response. If you have a question then post it in one of the forums.

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Re: VS compiler error???

Mar 31st, 2007

Yes I copyed the code from tutorial, and VS compiler gives me this errors.

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------ Build started: Project: MyFirtsFile, Configuration: Debug Win32 ------
Compiling...
main.cpp
c:\users\jan\documents\visual studio 2005\projects\myfirtsfile\myfirtsfile\main.cpp(40) : error C2440: '=' : cannot convert from 'const char [14]' to 'LPCWSTR'
Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
c:\users\jan\documents\visual studio 2005\projects\myfirtsfile\myfirtsfile\main.cpp(46) : error C2664: 'MessageBoxW' : cannot convert parameter 2 from 'const char [28]' to 'LPCWSTR'
Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
c:\users\jan\documents\visual studio 2005\projects\myfirtsfile\myfirtsfile\main.cpp(57) : error C2664: 'CreateWindowExW' : cannot convert parameter 2 from 'const char [14]' to 'LPCWSTR'
Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
c:\users\jan\documents\visual studio 2005\projects\myfirtsfile\myfirtsfile\main.cpp(62) : error C2664: 'MessageBoxW' : cannot convert parameter 2 from 'const char [24]' to 'LPCWSTR'
Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
c:\users\jan\documents\visual studio 2005\projects\myfirtsfile\myfirtsfile\main.cpp(75) : warning C4244: 'return' : conversion from 'WPARAM' to 'int', possible loss of data
Build log was saved at "file://c:\Users\jan\Documents\Visual Studio 2005\Projects\MyFirtsFile\MyFirtsFile\Debug\BuildLog.htm"
MyFirtsFile - 4 error(s), 1 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

Last edited by jan1024188; Mar 31st, 2007 at 5:24 am.

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Re: VS compiler error???

Mar 31st, 2007

Finally, actual error messages.

What you have there is a UNICODE problem. VS2003 onwards defaults to using UNICODE for all strings, not ASCII.

Anytime you see functions ending in 'W' or references to 'WSTR', it's a good bet it's something to do with migrating from ASCII to UNICODE.

The fix is pretty easy.
In the project settings, there is a section for the "Preprocessor"
Part of that will be a list of defines which are constant through the whole project (say WIN32). One of those should be "UNICODE", which you should remove.

After you've done that, rebuild it and see what happens.

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Re: VS compiler error???

#10

Mar 31st, 2007

Um...I have a problem

Under preprocessor->definitions there is no UNICODE

Its WIN32;_DEBUG;_WINDOWS only

But under list of options I have
/Od /D "WIN32" /D "_DEBUG" /D "_WINDOWS" /D "_UNICODE" /D "UNICODE" /Gm /EHsc /RTC1 /MDd /Fo"Debug\\" /Fd"Debug\vc80.pdb" /W3 /nologo /c /Wp64 /ZI /TP /errorReport:prompt

I cannot edit that, because text browser is grayed

Last edited by jan1024188; Mar 31st, 2007 at 6:09 am.

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