Question

So to make things clear, I’ll just state that there are three different ways to develop windows app through c++.

1. Windows API. This is the fundamental interface and most laborious.
2. MFC
3. Windows Form with CLR

So yes, I want to do this the hard way, the windows API way. I already understand the basics and have a working program.

My problem is this:

case WM_KEYDOWN:
   rect2.top += 10;
   rect2.bottom += 10;
   InvalidateRect(hWnd, NULL, TRUE);
   return 0;

I only know that a key is down and have no idea how to be a little specific, perhaps the down key. Also how do you manually establish an event which only takes a double click in MFC or CLR. I hope you guys will answer and thank you.

Answer 1

You have an overview and some examples in “Using Keyboard Input“. As stated in a comment, processing keyboard events might not be obvious, depending on what you want exactly. A list of virtual key code is available here.

case WM_KEYDOWN: 
    switch (wParam) 
    { 
        case VK_LEFT: 

            // Process the LEFT ARROW key. 

            break; 

        case VK_RIGHT: 

            // Process the RIGHT ARROW key. 

            break; 

        case VK_UP: 

            // Process the UP ARROW key. 

            break; 

        case VK_DOWN: 

            // Process the DOWN ARROW key. 

            break; 

        // Process other non-character keystrokes. 

        default: 
            break; 
    }