HelloWin!
in [Visual C]
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From: Robby on 10 Sep 2005 15:52 A MILLION SORRY'S ......... "ALT 179" is not the same as "ALT124" | I have replaced the bar symbol from to |, this solved alot of the errors! However here are the last three errors: CPZ_P44 error LNK2019: unresolved external symbol __imp__PlaySoundA(a)12 referenced in function "long __stdcall WndProc(struct HWND__ *,unsigned int,unsigned int,long)" (?WndProc@@YGJPAUHWND__@@IIJ@Z) CPZ_P44 fatal error LNK1120: 1 unresolved externals c:\DATASOURCE_EXTRA\Programming\VC++CodeTesting_WINDOWS\CPZ_P44\HELLOWIN.cpp(52): warning C4244: 'return' : conversion from 'WPARAM' to 'int', possible loss of data I believe that I must make an addition to the object libraries. I need to add the WINMM.LIB so that this program gets to function correctly, Mr. Petzold shows how to do this, however its not shown for VS7. I think that this is what the errors refer to. Does anyone know how to do this? All answers appreciated, so I can get through this innitial learning knot! -- Best regards Robert "Robby" wrote: > Hi, > > Trying the first windows program in Charles Petzold's book and getting many > errors. Boy, this windows programming, not an easy world ! > > Here is the code in its simplist nature: > > #include <windows.h> > > LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM); > > int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, > PSTR szCmdLine, int iCmdShow) > { > static TCHAR szAppName[] = TEXT ("HelloWin"); > HWND hwnd; > MSG msg; > WNDCLASS wndclass; > > wndclass.style = CS_HREDRAW CS_VREDRAW; > wndclass.lpfnWndProc = WndProc; > wndclass.cbClsExtra = 0; > wndclass.cbWndExtra = 0; > wndclass.hInstance = hInstance; > wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION); > wndclass.hCursor = LoadCursor (NULL,IDC_ARROW); > wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH); > wndclass.lpszMenuName = NULL; > wndclass.lpszClassName = szAppName; > > if (!RegisterClass (&wndclass)) > { > MessageBox(NULL,TEXT ("This program requires Windows NT!"), > szAppName, MB_ICONERROR); > return 0; > } > > hwnd = CreateWindow (szAppName, > TEXT ("The Hello program"), > WS_OVERLAPPEDWINDOW, > CW_USEDEFAULT, > CW_USEDEFAULT, > CW_USEDEFAULT, > CW_USEDEFAULT, > NULL, > NULL, > hInstance, > NULL); > > ShowWindow (hwnd, iCmdShow); > UpdateWindow(hwnd); > > while (GetMessage (&msg, NULL,0,0)) > { > TranslateMessage (&msg); > DispatchMessage(&msg); > } > > return msg.wParam; > } > > LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM > lParam) > { > HDC hdc; > PAINTSTRUCT ps; > RECT rect; > > switch(message) > { > case WM_CREATE: > PlaySound (TEXT ("hellowin.wav"), NULL, SND_FILENAME SND_ASYNC); > return 0; > > case WM_PAINT: > hdc = BeginPaint(hwnd, &ps); > GetClientRect (hwnd,&rect); > DrawText (hdc, TEXT ("Hello, Windows 98!"), -1,&rect, > DT_SINGLELINE DT_CENTER DT_VCENTER); > EndPaint (hwnd, &ps); > return 0; > case WM_DESTROY: > PostQuitMessage (0); > return 0; > } > return DefWindowProc(hwnd, message, wParam, lParam); > } > > I don't know why I am getting all sorts of errors, can someone please take a > look at this! > > Thanks > > -- > Best regards > Robert
From: Jochen Kalmbach [MVP] on 10 Sep 2005 16:03 Hi Robby! > CPZ_P44 error LNK2019: unresolved external symbol __imp__PlaySoundA(a)12 > referenced in function "long __stdcall WndProc(struct HWND__ *,unsigned > int,unsigned int,long)" (?WndProc@@YGJPAUHWND__@@IIJ@Z) > > CPZ_P44 fatal error LNK1120: 1 unresolved externals > > c:\DATASOURCE_EXTRA\Programming\VC++CodeTesting_WINDOWS\CPZ_P44\HELLOWIN.cpp(52): > warning C4244: 'return' : conversion from 'WPARAM' to 'int', possible loss of > data > > I believe that I must make an addition to the object libraries. I need to > add the WINMM.LIB so that this program gets to function correctly, Mr. > Petzold shows how to do this, however its not shown for VS7. The easiest way is to add the following to your cpp or h-file: #pragma comment(lib, "winmm.lib") The problem with the warning is the check for x64-porting issues... You can either disable this check (project settings, disable /Wp64) or correct theconversion from WPARAM to int.... -- Greetings Jochen My blog about Win32 and .NET http://blog.kalmbachnet.de/
From: Robby on 10 Sep 2005 16:23 Hey thats great! Thanks Jochen Kalmbach! It compiles without an error! However I am a novice C++ Programmer with virtually no Windows programming experience. Why doesn't Charles Petzold show this in his example? However my freind, unfortunately, I really don't understand by what you mean by: The problem with the warning is the check for x64-porting issues... You can either disable this check (project settings, disable /Wp64) or correct theconversion from WPARAM to int.... SORRY! Also when I do project, I don't see settings? I remember reading something about #pragma! I would have to look it up. Since my examples don't include the pragma declaration, I was wondering if we can add the library by going through VS7 menus without having to add the following declaration in my code: #pragma comment(lib, "winmm.lib") -- Best regards Robert -- Best regards Robert "Jochen Kalmbach [MVP]" wrote: > Hi Robby! > > > CPZ_P44 error LNK2019: unresolved external symbol __imp__PlaySoundA(a)12 > > referenced in function "long __stdcall WndProc(struct HWND__ *,unsigned > > int,unsigned int,long)" (?WndProc@@YGJPAUHWND__@@IIJ@Z) > > > > CPZ_P44 fatal error LNK1120: 1 unresolved externals > > > > c:\DATASOURCE_EXTRA\Programming\VC++CodeTesting_WINDOWS\CPZ_P44\HELLOWIN.cpp(52): > > warning C4244: 'return' : conversion from 'WPARAM' to 'int', possible loss of > > data > > > > I believe that I must make an addition to the object libraries. I need to > > add the WINMM.LIB so that this program gets to function correctly, Mr. > > Petzold shows how to do this, however its not shown for VS7. > > The easiest way is to add the following to your cpp or h-file: > #pragma comment(lib, "winmm.lib") > > > The problem with the warning is the check for x64-porting issues... > You can either disable this check (project settings, disable /Wp64) or > correct theconversion from WPARAM to int.... > > -- > Greetings > Jochen > > My blog about Win32 and .NET > http://blog.kalmbachnet.de/ >
From: Drew on 13 Sep 2005 18:16 Right-click your project and select Properties. Go to the Linker node of the tree control and select Input. Additional libraries to link go in the Additional Dependencies edit box. HTH, Drew "Robby" <Robby(a)discussions.microsoft.com> wrote in message news:B7ED460A-F389-4BB1-8BFF-B23E5E185E7B(a)microsoft.com... > Hey thats great! Thanks Jochen Kalmbach! > > It compiles without an error! However I am a novice C++ Programmer with > virtually no Windows programming experience. Why doesn't Charles Petzold > show > this in his example? > > However my freind, unfortunately, I really don't understand by what you > mean > by: > > The problem with the warning is the check for x64-porting issues... > You can either disable this check (project settings, disable /Wp64) or > correct theconversion from WPARAM to int.... > > > SORRY! > Also when I do project, I don't see settings? > > I remember reading something about #pragma! I would have to look it up. > Since my examples don't include the pragma declaration, I was wondering if > we > can add the library by going through VS7 menus without having to add the > following declaration in my code: > > #pragma comment(lib, "winmm.lib") > > -- > Best regards > Robert > > -- > Best regards > Robert > > > "Jochen Kalmbach [MVP]" wrote: > >> Hi Robby! >> >> > CPZ_P44 error LNK2019: unresolved external symbol __imp__PlaySoundA(a)12 >> > referenced in function "long __stdcall WndProc(struct HWND__ *,unsigned >> > int,unsigned int,long)" (?WndProc@@YGJPAUHWND__@@IIJ@Z) >> > >> > CPZ_P44 fatal error LNK1120: 1 unresolved externals >> > >> > c:\DATASOURCE_EXTRA\Programming\VC++CodeTesting_WINDOWS\CPZ_P44\HELLOWIN.cpp(52): >> > warning C4244: 'return' : conversion from 'WPARAM' to 'int', possible >> > loss of >> > data >> > >> > I believe that I must make an addition to the object libraries. I need >> > to >> > add the WINMM.LIB so that this program gets to function correctly, Mr. >> > Petzold shows how to do this, however its not shown for VS7. >> >> The easiest way is to add the following to your cpp or h-file: >> #pragma comment(lib, "winmm.lib") >> >> >> The problem with the warning is the check for x64-porting issues... >> You can either disable this check (project settings, disable /Wp64) or >> correct theconversion from WPARAM to int.... >> >> -- >> Greetings >> Jochen >> >> My blog about Win32 and .NET >> http://blog.kalmbachnet.de/ >>
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