Win32 API tutorial

 I have never used Win32 APIs, however it's time for me to use them because I must complete my project.

http://zetcode.com/tutorials/winapi/index.html

zetcodes' API tutorial, however it is not really helpful to me so far. (It's too short to explain everything about API)

The concept of API is just "defined interface for windows application programming"

I must be accustomed to using them easily. It will take time for sure.

This is my first code using win32 API(I just copied an example from that website)

#include <windows.h>

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

int WINAPI WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, 
    LPSTR lpCmdLine, int nCmdShow )
{
  MSG  msg ;    
  HWND hwnd;
  WNDCLASS wc;
	
  wc.style         = CS_HREDRAW | CS_VREDRAW;
  wc.cbClsExtra    = 0;
  wc.cbWndExtra    = 0;
  wc.lpszClassName = TEXT( "Window" );
  wc.hInstance     = hInstance ;
  wc.hbrBackground = GetSysColorBrush(COLOR_3DFACE);
  wc.lpszMenuName  = NULL;
  wc.lpfnWndProc   = WndProc;
  wc.hCursor       = LoadCursor(NULL, IDC_ARROW);
  wc.hIcon         = LoadIcon(NULL, IDI_APPLICATION);
  
  RegisterClass(&wc);
  hwnd = CreateWindow( wc.lpszClassName, TEXT("Window"),
                WS_OVERLAPPEDWINDOW | WS_VISIBLE,
                100, 100, 250, 150, NULL, NULL, hInstance, NULL);  

  ShowWindow(hwnd, nCmdShow);
  UpdateWindow(hwnd);

  while( GetMessage(&msg, NULL, 0, 0)) {
    DispatchMessage(&msg);
  }
  return (int) msg.wParam;
}

LRESULT CALLBACK WndProc( HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam )
{
  switch(msg)  
  {
    case WM_DESTROY:
      {
        PostQuitMessage(0);
        return 0;
      }
  }
  return DefWindowProc(hwnd, msg, wParam, lParam);
}

Pretty easy. All methods are defined in advance, we just use it.
The result is that one dialog(msgbox) will appear on a display that's all