(no subject)

[Eldemar@aol.com]

Good afternoon, 

I'm a long time programmer, new to windows and Graphics programming.

Any help on this type of error?  It looks like something simple, like 
changing a type, but I can't figure it out.

Platform Visual C++ 6.0, with approrpiate files added to project compile 
options.




Compiling...
dirdraw.cpp
C:\Program Files\Microsoft Visual Studio\MyProjects\Chap9\dirdraw.cpp(86) : 
error C2440: '=' : cannot convert from 'long (__stdcall *)(void *,unsigned 
int,unsigned int,long)' to 'long (__stdcall *)(struct HWND__ *,unsigned 
int,unsigned int,long)'
        This conversion requires a reinterpret_cast, a C-style cast or 
function-style cast
C:\Program Files\Microsoft Visual Studio\MyProjects\Chap9\dirdraw.cpp(89) : 
error C2440: '=' : cannot convert from 'void *' to 'struct HINSTANCE__ *'
        Conversion from 'void*' to pointer to non-'void' requires an explicit 
cast
C:\Program Files\Microsoft Visual Studio\MyProjects\Chap9\dirdraw.cpp(90) : 
error C2664: 'LoadIconA' : cannot convert parameter 1 from 'void *' to 
'struct HINSTANCE__ *'
        Conversion from 'void*' to pointer to non-'void' requires an explicit 
cast
C:\Program Files\Microsoft Visual Studio\MyProjects\Chap9\dirdraw.cpp(114) : 
error C2664: 'CreateWindowExA' : cannot convert parameter 11 from 'void *' to 
'struct HINSTANCE__ *'
        Conversion from 'void*' to pointer to non-'void' requires an explicit 
cast
C:\Program Files\Microsoft Visual Studio\MyProjects\Chap9\dirdraw.cpp(132) : 
error C2664: 'CreateWindowExA' : cannot convert parameter 11 from 'void *' to 
'struct HINSTANCE__ *'
        Conversion from 'void*' to pointer to non-'void' requires an explicit 
cast
Error executing cl.exe.

smallprog.exe - 5 error(s), 0 warning(s)


The offending code in my dirdraw.cpp:

HWND DIRECT_DRAW_MANAGER:: CreateMainWindow (const int w, const int h, 
            const char* ClassName, 
            void* MessageLoop, 
            void* hInst,
            const bool FullScreen)
{
    if (NotInitializedFlag == false) return NULL;// already initialized
    WNDCLASS    wc;
    FullScreenFlag = FullScreen;// store this value

    wc.style=           CS_HREDRAW | CS_VREDRAW;
    <FIRST ERROR HERE>  wc.lpfnWndProc =    (long (__stdcall *)(void 
*,unsigned int,unsigned int,long)) MessageLoop;
    wc.cbClsExtra =     0;
    wc.cbWndExtra =     0;
    wc.hInstance =      hInst;
    wc.hIcon =          LoadIcon (hInst, IDI_APPLICATION);
    wc.hCursor =        LoadCursor(NULL, IDC_ARROW);
    wc.hbrBackground =  NULL;
    wc.lpszMenuName =   ClassName;//NULL;
    wc.lpszClassName =  ClassName;


Below is messageloop:
LRESULT CALLBACK MessageLoop (HWND hwnd, UINT message, WPARAM wParam, LPARAM 
lParam)
{
    int mousex, mousey;
    static DragMouse;

    switch(message)
    {
        case WM_ACTIVATEAPP:
           ActiveApp = wParam;
        break;

        case WM_CREATE:
        break;


etc..

This is a direct copy of the program as is by Mickey Kawick in the book Game 
Programming using MS DirectX 6.0


Can I tell my compilker not to check types so strickly?

If you respond, please reply to 
Eldemar@AOL.COM

I know you are busy, so don't feel too bad about replying with "Don't have 
the time" 

;)

Thanks 
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