hellowin.c

Windows程序设计讲义。我们学校的上课的讲义

/*------------------------------------------------------------
   HELLOWIN.C -- Displays "Hello, Windows!" in client area
                 (c) Charles Petzold, 1998
  ------------------------------------------------------------*/

#include <windows.h>
#include "resource.h"

LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
LRESULT CALLBACK WndProc1 (HWND, UINT, WPARAM, LPARAM) ;

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
                    PSTR szCmdLine, int iCmdShow)
{
     static TCHAR szAppName[] = TEXT ("HelloWin");
	 static TCHAR szAppNameChild[] = TEXT("HelloWinChild");
	 HWND         hwnd1;
     HWND         hwnd;
     MSG          msg;
     WNDCLASS     wndclass, wndclass1;

	 HMENU hMenu = LoadMenu(NULL, MAKEINTRESOURCE(IDR_MAINMENU));

     wndclass.style         = CS_HREDRAW | CS_VREDRAW ;
     wndclass.lpfnWndProc   = WndProc ;
     wndclass.cbClsExtra    = 0 ;
     wndclass.cbWndExtra    = 0 ;
     wndclass.hInstance     = hInstance ;
     wndclass.hIcon         = LoadIcon (NULL, IDI_APPLICATION) ;
     wndclass.hCursor       = LoadCursor (NULL, IDC_ARROW) ;
     wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
     wndclass.lpszMenuName  = NULL ;
     wndclass.lpszClassName = szAppName ;

     wndclass1.style         = CS_HREDRAW | CS_VREDRAW;
     wndclass1.lpfnWndProc   = WndProc1;
     wndclass1.cbClsExtra    = 0 ;
     wndclass1.cbWndExtra    = 0 ;
     wndclass1.hInstance     = hInstance;
     wndclass1.hIcon         = LoadIcon (NULL, IDI_APPLICATION) ;
     wndclass1.hCursor       = LoadCursor (NULL, IDC_ARROW) ;
     wndclass1.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
     wndclass1.lpszMenuName  = NULL ;
     wndclass1.lpszClassName = szAppNameChild;

     if (!RegisterClass (&wndclass))
     {
          MessageBox (NULL, TEXT ("This program requires Windows NT!"), 
                      szAppName, MB_ICONERROR) ;
          return 0 ;
     }
     
     if (!RegisterClass (&wndclass1))
     {
          MessageBox (NULL, TEXT ("This program requires Windows NT!"), 
                      szAppName, MB_ICONERROR) ;
          return 0 ;
     }

     hwnd = CreateWindow (szAppName,                  // window class name
                          TEXT ("The Hello Program"), // window caption
                          WS_OVERLAPPEDWINDOW|WS_CLIPCHILDREN,        // window style
                          CW_USEDEFAULT,              // initial x position
                          CW_USEDEFAULT,              // initial y position
                          CW_USEDEFAULT,              // initial x size
                          CW_USEDEFAULT,              // initial y size
                          NULL,                       // parent window handle
                          hMenu,                       // window menu handle
                          hInstance,                  // program instance handle
                          NULL) ;                     // creation parameters
     
     ShowWindow (hwnd, iCmdShow) ;
     UpdateWindow (hwnd) ;
     
     hwnd1 = CreateWindow (szAppNameChild,                  // window class name
                          TEXT ("The Hello Program Child"), // window caption
                          WS_CHILD|WS_OVERLAPPEDWINDOW,                         // window style
                          5,              // initial x position
                          5,              // initial y position
                          200,              // initial x size
                          200,              // initial y size
                          hwnd,                       // parent window handle
                          NULL,                       // window menu handle
                          hInstance,                  // program instance handle
                          NULL) ;                     // creation parameters
     
     ShowWindow (hwnd1, iCmdShow) ;
     UpdateWindow (hwnd1) ;

	 PostMessage(hwnd, WM_PAINT, 0, 0);

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

LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
     HDC         hdc ;
     PAINTSTRUCT ps ;
     RECT        rect ;
     
     switch (message)
     {
     case WM_CREATE:
          PlaySound (TEXT ("hellowin.wav"), NULL, SND_FILENAME | SND_ASYNC) ;
          return 0 ;
          
     case WM_PAINT:
          hdc = BeginPaint (hwnd, &ps) ;
          
          GetClientRect (hwnd, &rect) ;
          
          DrawText (hdc, TEXT ("Hello, Windows!"), -1, &rect,
                    DT_SINGLELINE | DT_CENTER | DT_VCENTER) ;
          
          DrawText (hdc, TEXT ("Hello, Windows11111111!"), -1, &rect,
                    0) ;

          EndPaint (hwnd, &ps) ;
          return 0 ;
          
     case WM_DESTROY:
          PostQuitMessage (0) ;
          return 0 ;
     }
     return DefWindowProc (hwnd, message, wParam, lParam) ;
}

LRESULT CALLBACK WndProc1 (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
     HDC         hdc ;
     PAINTSTRUCT ps ;
     RECT        rect ;
     
     switch (message)
     {
     case WM_CREATE:
          PlaySound (TEXT ("hellowin.wav"), NULL, SND_FILENAME | SND_ASYNC) ;
          return 0 ;
          
     case WM_PAINT:
          hdc = BeginPaint (hwnd, &ps) ;
          
          GetClientRect (hwnd, &rect) ;
          
          DrawText (hdc, TEXT ("this is Child!"), -1, &rect,
                    DT_SINGLELINE | DT_CENTER | DT_VCENTER) ;
          
          EndPaint (hwnd, &ps) ;
          return 0 ;
          
     case WM_DESTROY:
          return 0 ;
     }
     return DefWindowProc (hwnd, message, wParam, lParam) ;
}