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- /*------------------------------------------
- ICONDEMO.C -- Icon Demonstration Program
- (c) Charles Petzold, 1998
- ------------------------------------------*/
-
- #include <windows.h>
- #include "resource.h"
-
- LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
-
- int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
- PSTR szCmdLine, int iCmdShow)
- {
- TCHAR szAppName[] = TEXT ("IconDemo") ;
- HWND hwnd ;
- MSG msg ;
- WNDCLASS wndclass ;
-
- wndclass.style = CS_HREDRAW | CS_VREDRAW ;
- wndclass.lpfnWndProc = WndProc ;
- wndclass.cbClsExtra = 0 ;
- wndclass.cbWndExtra = 0 ;
- wndclass.hInstance = hInstance ;
- wndclass.hIcon = LoadIcon (hInstance, MAKEINTRESOURCE (IDI_ICON)) ;
- wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ;
- wndclass.hbrBackground = GetStockObject (WHITE_BRUSH) ;
- wndclass.lpszMenuName = NULL ;
- wndclass.lpszClassName = szAppName ;
-
- if (!RegisterClass (&wndclass))
- {
- MessageBox (NULL, TEXT ("This program requires Windows NT!"),
- szAppName, MB_ICONERROR) ;
- return 0 ;
- }
-
- hwnd = CreateWindow (szAppName, TEXT ("Icon Demo"),
- WS_OVERLAPPEDWINDOW,
- CW_USEDEFAULT, CW_USEDEFAULT,
- CW_USEDEFAULT, CW_USEDEFAULT,
- NULL, NULL, hInstance, NULL) ;
-
- ShowWindow (hwnd, iCmdShow) ;
- UpdateWindow (hwnd) ;
-
- while (GetMessage (&msg, NULL, 0, 0))
- {
- TranslateMessage (&msg) ;
- DispatchMessage (&msg) ;
- }
- return msg.wParam ;
- }
-
- LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
- {
- static HICON hIcon ;
- static int cxIcon, cyIcon, cxClient, cyClient ;
- HDC hdc ;
- HINSTANCE hInstance ;
- PAINTSTRUCT ps ;
- int x, y ;
-
- switch (message)
- {
- case WM_CREATE :
- hInstance = ((LPCREATESTRUCT) lParam)->hInstance ;
- hIcon = LoadIcon (hInstance, MAKEINTRESOURCE (IDI_ICON)) ;
- cxIcon = GetSystemMetrics (SM_CXICON) ;
- cyIcon = GetSystemMetrics (SM_CYICON) ;
- return 0 ;
-
- case WM_SIZE :
- cxClient = LOWORD (lParam) ;
- cyClient = HIWORD (lParam) ;
- return 0 ;
-
- case WM_PAINT :
- hdc = BeginPaint (hwnd, &ps) ;
-
- for (y = 0 ; y < cyClient ; y += cyIcon)
- for (x = 0 ; x < cxClient ; x += cxIcon)
- DrawIcon (hdc, x, y, hIcon) ;
-
- EndPaint (hwnd, &ps) ;
- return 0 ;
-
- case WM_DESTROY :
- PostQuitMessage (0) ;
- return 0 ;
- }
- return DefWindowProc (hwnd, message, wParam, lParam) ;
- }
-