Window API建立視窗函數

LRESULT CALLBACK WndProc (HWND, UINT,
WPARAM, LPARAM) ;

 

int WINAPI WinMain (HINSTANCE hInstance,
HINSTANCE hPrevInstance,

PSTR szCmdLine, int iCmdShow)

{

static TCHAR szAppName[] = TEXT
("HelloWin") ;

HWND hwnd ;

MSG msg ;

WNDCLASS wc ;

 

wc.style = CS_HREDRAW | CS_VREDRAW
;

wc.lpfnWndProc = WndProc ;

wc.cbClsExtra = 0 ;

wc.cbWndExtra = 0 ;

wc.hInstance = hInstance ;

wc.hIcon = LoadIcon (NULL,
IDI_APPLICATION) ;

wc.hCursor = LoadCursor (NULL, IDC_ARROW)
;

wc.hbrBackground = (HBRUSH) GetStockObject
(WHITE_BRUSH) ;

wc.lpszMenuName = NULL ;

wc.lpszClassName = szAppName ;

 

if (!RegisterClass
(&wc))

{

MessageBox (NULL, TEXT ("This program
requires Windows NT!"),

szAppName, MB_ICONERROR) ;

return 0 ;

}

hwnd = CreateWindow (szAppName, // window
class name

TEXT ("歡迎你的到來!"), // window
caption

WS_OVERLAPPEDWINDOW, // window
style

CW_USEDEFAULT, // initial x
position

CW_USEDEFAULT, // initial y
position

CW_USEDEFAULT, // initial x
size

CW_USEDEFAULT, // initial y
size

NULL, // parent window handle

NULL, // window menu handle

hInstance, // program instance
handle

NULL) ; // creation parameters

 

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)

{

HDC hdc ;

PAINTSTRUCT ps ;

RECT rect ;

 

switch (message)

{

 

case WM_PAINT:

hdc = BeginPaint (hwnd, &ps)
;

 

GetClientRect (hwnd, &rect)
;

 

DrawText (hdc, TEXT ("你好,歡迎你來到VC之路!"), -1,
&rect,

DT_SINGLELINE | DT_CENTER | DT_VCENTER)
;

EndPaint (hwnd, &ps) ;

return 0 ;

 

case WM_DESTROY:

PostQuitMessage (0) ;

return 0 ;

}

return DefWindowProc (hwnd, message,
wParam, lParam) ;

}

 

 

1.填充WNDCLASS結構

2.RegisterClass 註冊視窗類別

3.CreateWindow建立視窗

4.ShowWindow 顯示視窗

5.UpDateWindow 更新視窗

6.while迴圈 GetMessage擷取訊息

7.TranslateMessage 翻譯鍵盤訊息

8.DisPatchMessage 發送訊息

 

9.視窗過程處理函數 DefWindowProc

DestroyWindow 摧毀視窗 PostQuitMessage 發送退出進程訊息 、ExitProcess退出進程