初始化位图

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hMemDC = CreateCompatibleDC(hdc);
hBitmap = LoadBitmap(hInst, "mybmp");
SelectObject(hMemDC, hBitmap);
GetObject(hBitmap, sizeof(BITMAP), &bitmap);

绘制位图

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BitBlt(hdc, bmx, bmy, bitmap.bmWidth, bitmap.bmHeight, hMemDC, 0, 0, SRCCOPY);
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LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    HDC hdc;
    PAINTSTRUCT ps;
    RECT rect;
    static HDC hMemDC;
    static HBITMAP hBitmap;
    static BITMAP bitmap;

    switch(message)
    {
    case WM_CREATE : // 初始化
        hdc = GetDC(hWnd);
        hMemDC = CreateCompatibleDC(hdc);
        hBitmap = LoadBitmap(hInst, "mybmp");
        SelectObject(hMemDC, hBitmap);
        GetObject(hBitmap, sizeof(BITMAP), &bitmap);
        ReleaseDC(hWnd, hdc);
        break;
    case WM_PAINT : // 重绘
        hdc = BeginPaint(hWnd, &ps);
        GetClientRect(hWnd, &rect);
        BitBlt(hdc, bmx, bmy, bitmap.bmWidth, bitmap.bmHeight, hMemDC, 0, 0, SRCCOPY);
        EndPaint(hWnd, &ps);
        break;
    case WM_DESTROY : // 析构
        DeleteObject(hBitmap);
        ReleaseDC(hWnd, hMemDC);
        PostQuitMessage(0);
        break;
    }
}

两张/多张位图

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hBitmap = (HBITMAP)LoadImage(NULL,"mybmp.bmp",IMAGE_BITMAP,800,800,LR_LOADFROMFILE);
hBitmap2 = (HBITMAP)LoadImage(NULL,"mybmp2.bmp",IMAGE_BITMAP,50,50,LR_LOADFROMFILE);
SelectObject(hMemDC, hBitmap);
GetObject(hBitmap, sizeof(BITMAP), &bitmap);
GetObject(hBitmap2, sizeof(BITMAP), &bitmap2);