Win32 自定一視窗

#include <windows.h>

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

// 注意如果 WndProc 聲明的時候 不起參數名 ， 則會報如下錯誤

//expected constructor, destructor, or type conversion before

LRESULT CALLBACK WndProc(HWND hWnd, UINT message,WPARAM wParam, LPARAM lParam);

// 程式進入點

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,

PSTR szCmdLine, int iCmdShow){

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

HWND hwnd;

MSG msg;

WNDCLASS wndclass;

wndclass.style = CS_HREDRAW | CS_VREDRAW;

wndclass.lpfnWndProc = WndProc;

wndclass.cbClsExtra = 0;

wndclass.cbWndExtra = 0;

wndclass.hInstance = hInstance;

// 加載 圖示供程式使用 IDI-圖示ID

wndclass.hIcon = LoadIcon(NULL,IDI_APPLICATION);

// 加載 滑鼠光标供程式使用 IDC-遊标ID

wndclass.hCursor = LoadCursor(NULL,IDC_ARROW);

//

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

wndclass.lpszMenuName = NULL;

wndclass.lpszClassName = szAppName;

//RegisterClass (&wndclass) ;

// 注冊

if(!RegisterClass(&wndclass)){

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

szAppName,MB_ICONERROR);

return 0;

}

hwnd = CreateWindow(szAppName, // window class name

TEXT("Hello world"), // window caption

WS_OVERLAPPEDWINDOW, // window style

CW_USEDEFAULT,

CW_USEDEFAULT,

CW_USEDEFAULT,

CW_USEDEFAULT,

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_CREATE:

//PlaySound (TEXT ("hellowin.wav"), NULL, SND_FILENAME | SND_ASYNC) ;

return 0 ;

case WM_PAINT:

hdc = BeginPaint (hwnd, &ps) ;

GetClientRect (hwnd, &rect) ;

DrawText (hdc, TEXT ("Hello, Windows 98!"), -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) ;

}

注意在 Eclipse for c/c++   & MinWG 環境下 

上述程式會出現如下問題：

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

undefined reference to `GetStockObject@4'

解決辦法：

右擊工程--property--c/c++ build -- setting ---MinGW C++ linker -- libraries --- add  [gdi32.lib]

==================

以上解決辦法： 思路來自

http://stackoverflow.com/questions/1351712/how-to-add-a-library-to-an-eclipse-project

right click to project -> Properties -> C/C++ Build, go to Library and add it there.