subject_17525.htm

一些关于vc的问答

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序号：17525 发表者：odq 发表日期：2002-10-12 17:39:03
<br>主题：请高手帮我看看这段代码哪里有错了（这是一个SDK的最小程序）
<br>内容：#include &lt;windows.h&gt;<BR>INT PASCAL WinMain(HINSTANCE,HINSTANCE,LPSTR,INT); <BR>LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM); <BR>HINSTANCE myhInst; <BR>char szAppName[]="WinAPIDemo"; <BR>char szAppTitle[]="A Application use Windows API"; <BR>INT PASCAL WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpCmdLine,int nShowCmd) <BR>{ <BR>HWND hMainwnd; <BR>MSG message; <BR>WNDCLASS myWC; <BR>if(!hPrevInstance) <BR>{ <BR>myWC.style=CS_HREDRAW|CS_VREDRAW; <BR>myWC.lpfnWndProc=WndProc; <BR>myWC.cbClsExtra=0; <BR>myWC.cbWndExtra=0; <BR>myWC.hInstance=hInstance; <BR>myWC.hIcon=LoadIcon(NULL,IDI_APPLICATION); <BR>myWC.hCursor=LoadCursor(NULL,IDC_ARROW); <BR>myWC.hbrBackground=GetStockObject(WHITE_BRUSH); <BR>myWC.lpszClassName=NULL; <BR>myWC.lpszMenuName=szAppName; <BR>RegisterClass(&myWC); <BR>} <BR>hMainwnd=CreateWindow(szAppName,szAppTitle,WS_OVERLAPPEDWINDOW,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,NULL,NULL,hInstance,NULL); <BR>ShowWindow(hMainwnd,SW_SHOWMAXIMIZED); <BR>UpdateWindow(hMainwnd); <BR>while(GetMessage(&message,NULL,0,0)) <BR>{ <BR>TranslateMessage(&message); <BR>DispatchMessage(&message); <BR>} <BR>return message.wParam; <BR>} <BR>LRESULT CALLBACK WndProc(HWND hMainwnd,UINT message,WPARAM wParam,LPARAM lParam) <BR>{ <BR>char messageLeft[]="This is demo program using API.\n""The left mouse button have been pressed!"; <BR>char messageRight[]="This is demo program using API.\n" "The reight mouse button have been pressed!"; <BR>switch(message) <BR>{ <BR>case WM_RBUTTONDOWN: <BR>{ <BR>MessageBeep(MB_ICONINFORMATION); <BR>MessageBox(GetFocus(),messageRight,"Message",MB_OK|MB_ICONINFORMATION); <BR>break; <BR>} <BR>case WM_LBUTTONDOWN: <BR>{ <BR>MessageBeep(MB_ICONINFORMATION); <BR>MessageBox(GetFocus(),messageLeft,"Message",MB_OK|MB_ICONINFORMATION); <BR>break; <BR>} <BR>case WM_DESTROY: <BR>{ <BR>PostQuitMessage(0); <BR>return 0; <BR>} <BR>default: <BR>break; <BR>} <BR>return DefWindowProc(hMainwnd,message,wParam,lParam); <BR>} <BR>我在这的机子上运行，连一个窗口的毛都没看到，急死我了&nbsp;&nbsp; ♂
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回复者：黄飚 回复日期：2002-10-12 22:10:46
<br>内容：switch(message) 是不是少了WM_ONPAINT的消息（手里没有VC，不知道这个消息的具体拼法）<BR>{ <BR>case WM_RBUTTONDOWN: <BR>{ <BR>MessageBeep(MB_ICONINFORMATION); <BR>MessageBox(GetFocus(),messageRight,"Message",MB_OK|MB_ICONINFORMATION); <BR>break; <BR>} <BR>case WM_LBUTTONDOWN: <BR>{ <BR>MessageBeep(MB_ICONINFORMATION); <BR>MessageBox(GetFocus(),messageLeft,"Message",MB_OK|MB_ICONINFORMATION); <BR>break; <BR>} <BR>case WM_DESTROY: <BR>{ <BR>PostQuitMessage(0); <BR>return 0; <BR>} <BR>default: <BR>break; <BR>
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回复者：菜鸟 回复日期：2002-10-13 01:15:33
<br>内容：myWC.lpszClassName=NULL; <BR>myWC.lpszMenuName=szAppName; <BR>这里错了！<BR>应该是：<BR>myWC.lpszClassName=szAppName; <BR>myWC.lpszMenuName=NULL; <BR>此外：<BR>RegisterClass(&myWC); 我建议你写成<BR>if(!RegisterClass(&myWC))<BR>{<BR>&nbsp;&nbsp;MessageBox(NULL,TEXT("ERROR"),szAppName,MB_ICONERROR);<BR>&nbsp;&nbsp;return 0;<BR>}<BR>这样有没有注册你才会知道！<BR>
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<font color=red>答案被接受</font><br>回复者：菜鸟 回复日期：2002-10-13 01:18:55
<br>内容：我想问一下INT PASCAL WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpCmdLine,int nShowCmd) <BR>中的PASCAL是什么？<BR>还有myWC.hbrBackground=GetStockObject(WHITE_BRUSH); <BR>好象要改成myWC.hbrBackground=（HBRUSH）GetStockObject(WHITE_BRUSH); 
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回复者：odq 回复日期：2002-10-13 20:25:55
<br>内容：感谢你们的回复，我调试成功后就给你加分， 。。如果有什么问题我再提， 那时又要劳烦你们。
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回复者：hxu 回复日期：2002-10-14 01:21:18
<br>内容：in windef.h <BR>#define PASCAL __stdcall
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回复者：odq 回复日期：2002-10-14 11:29:47
<br>内容：调试已通过,感谢菜鸟, 也麻烦黄飚 了.♂<BR>2002-10-14 11:30:37