MFC tank positioning

I recently learned about MFC and wrote a tank interface that is moved from top to bottom on the keyboard ,:

 

 

Use VC ++ to create a simple MFC project.

1. Add tank image resources: omitted

2. Add three variables: x, y, m_bitmap

 

3. Load bitmap in the initialization method and set the initial coordinates:

       ->m_bitmap.LoadBitmapW(IDB_BITMAP2);  ->m_bitmap.GetBitmap(&bmpInfo); ->GetWindowRect(&r);      ->x=(r.right-r.left)/-bmpInfo.bmWidth/;          ->y=(r.bottom-r.top)/-bmpInfo.bmHeight/;     

 

4. Rewrite the OnPaint function:

    CClientDC d(&&->m_bitmap.GetBitmap(&->x, ->y, bmpInfo.bmWidth, bmpInfo.bmHeight, &memDC, , , SRCCOPY);   

 

5. Mount the keyboard event:

    ->x-=->x+=->y-=->y+=->InvalidateRect(NULL);  

 

6. Due to the event mechanism in Dialog, you need to add a message preprocessing function to make the program truly receive the keydown event, as shown below:

BOOL Ctest3Dlg::PreTranslateMessage(MSG*     (pMsg->message ==->wParam, pMsg->

The above is relatively simple, and event association is not written in, but it is not written because of the help of the UI wizard. For example:

 

Haha, now the tank can be controlled up and down.