Vykresleni obrazku pomoci DrawState – C / C++ – Fórum – Programujte.com

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Nejde mi vykreslit obrazek, pomoci DrawState

#include <windows.h>



LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);



void OnPaint(HDC hDC);



HINSTANCE hInstance;

HBITMAP hBitmap;



int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow)

{

    TCHAR szName[] = TEXT ("Project");

    HWND hWnd;

    MSG msg;

    WNDCLASSEX wc;

    HDC hDC;

    

    wc.cbSize = sizeof(wc);

    wc.style = CS_HREDRAW | CS_VREDRAW;

    wc.lpfnWndProc = WndProc;

    wc.cbClsExtra = 0;

    wc.cbWndExtra = 0;

    wc.hInstance = hInstance;

    wc.hIcon = LoadIcon(hInstance,

     IDI_APPLICATION);

    wc.hIconSm = NULL;

    wc.hCursor = LoadCursor(NULL,

     IDC_ARROW);

    wc.hbrBackground = (HBRUSH)(COLOR_WINDOW +1);

    wc.lpszMenuName = NULL;

    wc.lpszClassName = szName;



    RegisterClassEx(&wc);

    

    hWnd = CreateWindow(szName, szName, WS_CAPTION,CW_USEDEFAULT, CW_USEDEFAULT,

     CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance, NULL);

     

    ShowWindow(hWnd, iCmdShow);

    UpdateWindow(hWnd);

    

    OnPaint(hDC);

    

    while(GetMessage(&msg, NULL, 0, 0))

    {

                           TranslateMessage(&msg);

                           DispatchMessage(&msg);

    }

    return msg.wParam;

}



void OnPaint(HDC hDC)

{

     hBitmap = (HBITMAP) LoadImage(hInstance, "obrazek.bmp",

      IMAGE_BITMAP, 0, 0, LR_DEFAULTSIZE | LR_LOADFROMFILE);

     DrawState(hDC, NULL, NULL, (LPARAM)hBitmap, 0, 20, 20,

      50, 50, DST_BITMAP);

     return; 

} 

     



LRESULT CALLBACK WndProc (HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)

{

        HMENU hMenu;

        HINSTANCE hInstance;

        HDC hDC;

        

        switch(message)

        {

                       case WM_DESTROY:

                            PostQuitMessage(0);

                            return 0;                                  

        }              

        return DefWindowProc(hWnd, message, wParam, lParam);      

}