show_prop.cpp

最新推荐文章于 2025-08-13 18:08:55 发布

原创最新推荐文章于 2025-08-13 18:08:55 发布 · 367 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#application #null #callback #command #include #windows

S 专栏收录该内容

172 篇文章

订阅专栏

本文提供了一个Windows应用程序示例，展示了如何使用SetProp和GetProp函数来为窗口添加和检索属性值。通过简单的实例，读者可以了解到如何在窗口上设置字符串类型的属性，并在消息响应中获取这些属性。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

name="google_ads_frame" marginwidth="0" marginheight="0" src="http://pagead2.googlesyndication.com/pagead/ads?client=ca-pub-5572165936844014&dt=1194442938015&lmt=1194190197&format=336x280_as&output=html&correlator=1194442937843&url=file%3A%2F%2F%2FC%3A%2FDocuments%2520and%2520Settings%2Flhh1%2F%E6%A1%8C%E9%9D%A2%2FCLanguage.htm&color_bg=FFFFFF&color_text=000000&color_link=000000&color_url=FFFFFF&color_border=FFFFFF&ad_type=text&ga_vid=583001034.1194442938&ga_sid=1194442938&ga_hid=1942779085&flash=9&u_h=768&u_w=1024&u_ah=740&u_aw=1024&u_cd=32&u_tz=480&u_java=true" frameborder="0" width="336" scrolling="no" height="280" allowtransparency="allowtransparency">
#include <windows.h>
#include "show_prop.h"

#if defined (WIN32)
#define IS_WIN32 TRUE
#else
#define IS_WIN32 FALSE
#endif

#define IS_NT IS_WIN32 && (BOOL)(GetVersion() < 0x80000000)
#define IS_WIN32S IS_WIN32 && (BOOL)(!(IS_NT) && (LOBYTE(LOWORD(GetVersion()))<4))
#define IS_WIN95 (BOOL)(!(IS_NT) && !(IS_WIN32S)) && IS_WIN32

HINSTANCE hInst; // current instance

LPCTSTR lpszAppName = "MyApp";
LPCTSTR lpszTitle = "Show_Prop";

BOOL RegisterWin95( CONST WNDCLASS* lpwc );

int APIENTRY WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance,
                      LPTSTR lpCmdLine, int nCmdShow)
{
   MSG      msg;
   HWND     hWnd;
   WNDCLASS wc;

   // Register the main application window class.
   //............................................
   wc.style         = CS_HREDRAW | CS_VREDRAW;
   wc.lpfnWndProc   = (WNDPROC)WndProc;
   wc.cbClsExtra    = 0;
   wc.cbWndExtra    = 0;
   wc.hInstance     = hInstance;
   wc.hIcon         = LoadIcon( hInstance, lpszAppName );
   wc.hCursor       = LoadCursor(NULL, IDC_ARROW);
   wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
   wc.lpszMenuName = lpszAppName;
   wc.lpszClassName = lpszAppName;

   if ( IS_WIN95 )
   {
      if ( !RegisterWin95( &wc ) )
         return( FALSE );
   }
   else if ( !RegisterClass( &wc ) )
      return( FALSE );

hInst = hInstance;

   // Create the main application window.
   //....................................
   hWnd = CreateWindow( lpszAppName,
                        lpszTitle,
                        WS_OVERLAPPEDWINDOW,
                        CW_USEDEFAULT, 0,
                        CW_USEDEFAULT, 0,
                        NULL,
                        NULL,
                        hInstance,
                        NULL
                      );

if ( !hWnd )
return( FALSE );

ShowWindow( hWnd, nCmdShow );
UpdateWindow( hWnd );

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

return( msg.wParam );
}

BOOL RegisterWin95( CONST WNDCLASS* lpwc )
{
WNDCLASSEX wcex;

   wcex.style         = lpwc->style;
   wcex.lpfnWndProc   = lpwc->lpfnWndProc;
   wcex.cbClsExtra    = lpwc->cbClsExtra;
   wcex.cbWndExtra    = lpwc->cbWndExtra;
   wcex.hInstance     = lpwc->hInstance;
   wcex.hIcon         = lpwc->hIcon;
   wcex.hCursor       = lpwc->hCursor;
   wcex.hbrBackground = lpwc->hbrBackground;
   wcex.lpszMenuName = lpwc->lpszMenuName;
   wcex.lpszClassName = lpwc->lpszClassName;

   // Added elements for Windows 95.
   //...............................
   wcex.cbSize = sizeof(WNDCLASSEX);
   wcex.hIconSm = LoadImage(wcex.hInstance, lpwc->lpszClassName,
                            IMAGE_ICON, 16, 16,
                            LR_DEFAULTCOLOR );

   return RegisterClassEx( &wcex );
}

LRESULT CALLBACK WndProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
{
static LPCTSTR szProp = "Value for Property";

   switch( uMsg )
   {
      case WM_CREATE :
               // Add a property item that contains a string
               // pointer to the main window.
               //................................................
               SetProp( hWnd, "Property ID", (HANDLE)szProp );
               break;

      case WM_COMMAND :
              switch( LOWORD( wParam ) )
              {
                 case IDM_TEST :
                       // Get the value of the property added to the window
                       // and display it in a message box.
                       //..................................................
                       MessageBox( NULL,
                                   (LPCTSTR)GetProp( hWnd,"Property ID" ),
                                   "Property Value", MB_OK );
                       break;

                 case IDM_ABOUT :
                        DialogBox( hInst, "AboutBox", hWnd, (DLGPROC)About );
                        break;

                 case IDM_EXIT :
                        DestroyWindow( hWnd );
                        break;
              }
              break;

      case WM_DESTROY :
              // Remove the property item from the window. Since we
              // didn抰 allocate any memory for the property we don抰
              // need to free anything.
              //................................
              RemoveProp( hWnd, "Property ID" );
              PostQuitMessage(0);
              break;

      default :
            return( DefWindowProc( hWnd, uMsg, wParam, lParam ) );
   }

return( 0L );
}

LRESULT CALLBACK About( HWND hDlg,
                        UINT message,
                        WPARAM wParam,
                        LPARAM lParam)
{
   switch (message)
   {
       case WM_INITDIALOG:
               return (TRUE);

       case WM_COMMAND:
               if (   LOWORD(wParam) == IDOK
                   || LOWORD(wParam) == IDCANCEL)
               {
                       EndDialog(hDlg, TRUE);
                       return (TRUE);
               }
               break;
   }

return (FALSE);
}