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#include <windows.h>
#include "resource.h"
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
BOOL CALLBACK AboutDlgProc (HWND, UINT, WPARAM, LPARAM) ;
LRESULT CALLBACK EllipPushWndProc (HWND, UINT, WPARAM, LPARAM) ;
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
PSTR szCmdLine, int iCmdShow)
{
static TCHAR szAppName[] = TEXT ("About3") ;
MSG msg ;
HWND hwnd ;
WNDCLASS wndclass ;
wndclass.style = CS_HREDRAW | CS_VREDRAW ;
wndclass.lpfnWndProc = WndProc ;
wndclass.cbClsExtra = 0 ;
wndclass.cbWndExtra = 0 ;
wndclass.hInstance = hInstance ;
wndclass.hIcon = LoadIcon (hInstance, szAppName) ;
wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ;
wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
wndclass.lpszMenuName = szAppName ;
wndclass.lpszClassName = szAppName ;
if (!RegisterClass (&wndclass))
{
MessageBox (NULL, TEXT ("This program requires Windows NT!"),
szAppName, MB_ICONERROR) ;
return 0 ;
}
wndclass.style = CS_HREDRAW | CS_VREDRAW ;
wndclass.lpfnWndProc = EllipPushWndProc ;
wndclass.cbClsExtra = 0 ;
wndclass.cbWndExtra = 0 ;
wndclass.hInstance = hInstance ;
wndclass.hIcon = NULL ;
wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ;
wndclass.hbrBackground = (HBRUSH) (COLOR_BTNFACE + 1) ;
wndclass.lpszMenuName = NULL ;
wndclass.lpszClassName = TEXT ("EllipPush") ;
RegisterClass (&wndclass) ;
hwnd = CreateWindow (szAppName, TEXT ("About Box Demo Program"),
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 HINSTANCE hInstance ;
switch (message)
{
case WM_CREATE :
hInstance = ((LPCREATESTRUCT) lParam)->hInstance ;
return 0 ;
case WM_COMMAND :
switch (LOWORD (wParam))
{
case IDM_APP_ABOUT :
DialogBox (hInstance, TEXT ("AboutBox"), hwnd, AboutDlgProc) ;
return 0 ;
}
break ;
case WM_DESTROY :
PostQuitMessage (0) ;
return 0 ;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;
}
BOOL CALLBACK AboutDlgProc (HWND hDlg, UINT message,
WPARAM wParam, LPARAM lParam)
{
switch (message)
{
case WM_INITDIALOG :
return TRUE ;
case WM_COMMAND :
switch (LOWORD (wParam))
{
case IDOK :
EndDialog (hDlg, 0) ;
return TRUE ;
}
break ;
}
return FALSE ;
}
LRESULT CALLBACK EllipPushWndProc (HWND hwnd, UINT message,
WPARAM wParam, LPARAM lParam)
{
TCHAR szText[40] ;
HBRUSH hBrush ;
HDC hdc ;
PAINTSTRUCT ps ;
RECT rect ;
switch (message)
{
case WM_PAINT :
GetClientRect (hwnd, &rect) ;
GetWindowText (hwnd, szText, sizeof (szText)) ;
hdc = BeginPaint (hwnd, &ps) ;
hBrush = CreateSolidBrush (GetSysColor (COLOR_WINDOW)) ;
hBrush = (HBRUSH) SelectObject (hdc, hBrush) ;
SetBkColor (hdc, GetSysColor (COLOR_WINDOW)) ;
SetTextColor (hdc, GetSysColor (COLOR_WINDOWTEXT)) ;
Ellipse (hdc, rect.left, rect.top, rect.right, rect.bottom) ;
DrawText (hdc, szText, -1, &rect,
DT_SINGLELINE | DT_CENTER | DT_VCENTER) ;
DeleteObject (SelectObject (hdc, hBrush)) ;
EndPaint (hwnd, &ps) ;
return 0 ;
case WM_LBUTTONDOWN:
case WM_KEYUP :
if (wParam != VK_SPACE)
break ;
// fall through
case WM_LBUTTONUP :
SendMessage (GetParent (hwnd), WM_COMMAND,
GetWindowLong (hwnd, GWL_ID), (LPARAM) hwnd) ;
return 0 ;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;
}