《C／C++程序员实用大全》配套代码,适用初学C++的人员。

				#include 
				
				LRESULT CALLBACK WndProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
				{
				
				   switch (uMsg)
				   {
				         case WM_COMMAND:
				               switch ( LOWORD( wParam ) )
				               {
				                     case IDM_TEST:
				                     {
				                           SYSTEM_INFO si;
				                           char        szBuffer[128];
				                           HDC         hDC = GetDC( hWnd );
				
				                           GetSystemInfo( &si );
				                           // Report system info.
				                           wsprintf( szBuffer, "OEM Id: %X, Addr Range %lX-%lX",
				                                     si.dwOemId, si.lpMinimumApplicationAddress,
				                                     si.lpMaximumApplicationAddress);
				                           TextOut( hDC, 0, 0, szBuffer, lstrlen(szBuffer ) );
				                           wsprintf( szBuffer, "Page Size: %lX, Allocation: %lX",
				                                     si.dwPageSize, si.dwAllocationGranularity );
				                           TextOut( hDC, 0, 20, szBuffer, lstrlen(szBuffer ) );
				                           // Just test for Intel x86 chips. Windows 95 does not run
				                           // on the RISC-based architectures.
				                           wsprintf( szBuffer, "Type of Processor: %s",
				                                   ( si.dwProcessorType == PROCESSOR_INTEL_386 ) ?
				                                   "386" :
				                                   ( ( si.dwProcessorType == PROCESSOR_INTEL_486 ) ?
				                                   "486" : "PENTIUM" ) );
				                           TextOut( hDC, 0, 40, szBuffer, lstrlen(szBuffer ) );
				                           ReleaseDC( hWnd, hDC );
				                           return 0;
				                     }
				                     break;
				                     case IDM_EXIT:
				                           DestroyWindow( hWnd );
				                           break;
				               }
				               break;
				               case WM_DESTROY:
				                     PostQuitMessage( 0 );
				               break;
				         default:
				               return (DefWindowProc(hWnd, uMsg, wParam, lParam));
				   }
				   return (NULL);
				}