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- /*
- *
- * GetClassName.c
- *
- * This program demonstrates the use of the GetClassName function.
- * Given a handle to a window, GetClassName retrieves the class name of
- * that window. GetClassName is called from WinMain in this application.
- *
- */
-
- #include "windows.h"
-
- long FAR PASCAL HelloWndProc(HWND, unsigned, WORD, LONG);
-
- /* Procedure called when the application is loaded for the first time */
- BOOL HelloInit( hInstance )
- HANDLE hInstance;
- {
- PWNDCLASS pHelloClass;
-
- pHelloClass = (PWNDCLASS)LocalAlloc( LPTR, sizeof(WNDCLASS) );
-
- pHelloClass->hCursor = LoadCursor( NULL, IDC_ARROW );
- pHelloClass->hIcon = LoadIcon( hInstance,NULL);
- pHelloClass->lpszMenuName = (LPSTR)NULL;
- pHelloClass->lpszClassName = (LPSTR)"Sample Application";
- pHelloClass->hbrBackground = (HBRUSH)GetStockObject( WHITE_BRUSH );
- pHelloClass->hInstance = hInstance;
- pHelloClass->style = CS_HREDRAW | CS_VREDRAW;
- pHelloClass->lpfnWndProc = HelloWndProc;
-
- if (!RegisterClass( (LPWNDCLASS)pHelloClass ) )
- /* Initialization failed.
- * Windows will automatically deallocate all allocated memory.
- */
- return FALSE;
-
- LocalFree( (HANDLE)pHelloClass );
- return TRUE; /* Initialization succeeded */
- }
-
- int PASCAL WinMain( hInstance, hPrevInstance, lpszCmdLine, cmdShow )
- HANDLE hInstance, hPrevInstance;
- LPSTR lpszCmdLine;
- int cmdShow;
- {
- MSG msg;
- HWND hWnd;
- HMENU hMenu;
- char szClassName[30]; /* buffer to receive Class Name of hWnd */
- int nSizeBuff; /* return value from GetClassName */
-
- HelloInit( hInstance );
- hWnd = CreateWindow((LPSTR)"Sample Application",
- (LPSTR)"GetClassName",
- WS_OVERLAPPEDWINDOW,
- CW_USEDEFAULT,
- CW_USEDEFAULT,
- CW_USEDEFAULT,
- CW_USEDEFAULT,
- (HWND)NULL, /* no parent */
- (HMENU)NULL, /* use class menu */
- (HANDLE)hInstance, /* handle to window instance */
- (LPSTR)NULL /* no params to pass on */
- );
-
- /* Make window visible according to the way the app is activated */
- ShowWindow( hWnd, cmdShow );
- UpdateWindow( hWnd );
-
-
- /*** get the class name of the window associated with hWnd ***/
- nSizeBuff = GetClassName(hWnd,(LPSTR)szClassName,30);
-
-
- if (nSizeBuff == 0)
- {
- MessageBox(hWnd,(LPSTR)"is not valid ",
- (LPSTR)"The specified window handle",
- MB_OK);
- return 1;
- }
-
- MessageBox(hWnd,(LPSTR)szClassName,
- (LPSTR)"The class name is:",
- MB_OK);
-
- /* Polling messages from event queue */
- while (GetMessage((LPMSG)&msg, NULL, 0, 0)) {
- TranslateMessage((LPMSG)&msg);
- DispatchMessage((LPMSG)&msg);
- }
-
- return (int)msg.wParam;
- }
-
-
- /* Procedures which make up the window class. */
- long FAR PASCAL HelloWndProc( hWnd, message, wParam, lParam )
- HWND hWnd;
- unsigned message;
- WORD wParam;
- LONG lParam;
- {
- PAINTSTRUCT ps;
-
- switch (message)
- {
- case WM_SYSCOMMAND:
- return DefWindowProc( hWnd, message, wParam, lParam );
- break;
-
- case WM_DESTROY:
- PostQuitMessage( 0 );
- break;
-
- case WM_PAINT:
- BeginPaint( hWnd, (LPPAINTSTRUCT)&ps );
- EndPaint( hWnd, (LPPAINTSTRUCT)&ps );
- break;
-
- default:
- return DefWindowProc( hWnd, message, wParam, lParam );
- break;
- }
- return(0L);
- }
-