c++创建窗口 .. 第一个窗口就卡住了 ,求助啊
#include <Windows.h>
#include <stdio.h>
LRESULT CALLBACK MainProc(
HWND hwnd , //handle to window
UINT uMsg , //message indentfier
WPARAM wParam , // message parameter
LPARAM lParam
)
{
switch(uMsg)
{
case WM_CHAR:{
char st[20] ;
sprintf_s(st,"char is %d",wParam);
MessageBox(NULL ,st,"呵呵",0);
break;
//return 0;
}
case WM_LBUTTONDOWN:{
char wc[20] = "我勒个擦";
HDC hdc = GetDC(hwnd);
TextOut(hdc,100,300,wc,strlen(wc));
ReleaseDC(hwnd,hdc);
break;
//return 0;
}
case WM_PAINT:{
PAINTSTRUCT pt;
HDC hdcPaint = BeginPaint(hwnd,&pt); // pair;
TextOut(hdcPaint,60,60,"我勒个去啊",strlen("我勒个去啊"));
EndPaint(hwnd,&pt);//pair
break;
//return 0;
}
case WM_CLOSE:{
if(IDYES==MessageBox(hwnd,"是否真的结束？","weixin",MB_YESNO))
{
DestroyWindow(hwnd);
}
break;
//return 0;
}
case WM_DESTROY:{
PostQuitMessage(0);
break;
}
default:{
return DefWindowProc(hwnd,uMsg,wParam,lParam);
}
}
return 0;
}
int WINAPI WinMain(
HINSTANCE mainInstance , //handle current instance
HINSTANCE hPreviousInstance , // handle previous instance
LPSTR lpCmdLine , // command line
int nCmdShow // show state
)
{
WNDCLASS w;
w.cbClsExtra = 0;
w.cbWndExtra = 0;
w.hbrBackground = (HBRUSH)GetStockObject(DKGRAY_BRUSH);
w.hInstance = mainInstance ;
w.hCursor = LoadCursor(NULL, IDC_ARROW);
w.hIcon = LoadIcon(NULL, IDI_APPLICATION );
w.lpfnWndProc = MainProc ;
w.lpszClassName = " First window " ;
w.lpszMenuName = "";
w.style = CS_VREDRAW | CS_HREDRAW ;
if (!RegisterClass(&w)){ //注册窗口类 .
MessageBox(NULL, TEXT("Error !"),"test",MB_ICONERROR) ;
return 0;
}
//创建窗口
HWND hMyWindow;
hMyWindow = CreateWindow(
" Oh myWindow " , // lpClassName
" window name " , // lpWindowName
WS_OVERLAPPEDWINDOW , // window style
50 , // x
50 ,// y
600 ,// w
800 ,// h
NULL ,// parent window
NULL ,// menu
mainInstance ,// handle current instance
NULL// lpParam may be NULL if no additional data is needed.
);
//显示窗口
ShowWindow(hMyWindow,SW_SHOWNORMAL);
//更新窗口
UpdateWindow(hMyWindow);
// 消息循环
MSG msg ;
while (GetMessage(&msg ,NULL , 0 ,0 )){
TranslateMessage(&msg);//转换信息
DispatchMessage(&msg);//发送信息
}
return 0;
}
就是这个代码了 , 可以产生进程 , 但是窗口就是不出来 ...
看了好久了都不知道哪不对 , 编译在 vs2010下 ... 看书上代码敲的 , 请各位帮忙看看 , 谢谢 !!
[解决办法]
CreateWindow的第一个参数要和注册时候的w.lpszClassName 一致
把CreateWindow的第一个参数改成"First window"
[解决办法]
使用的窗口类没有注册，可以参考楼上的修改
[解决办法]
1.设计窗口类
2.注册窗口类
3.创建窗口
4.显示及更新窗口
[解决办法]
#include <Windows.h>#include <stdio.h>LRESULT CALLBACK MainProc( HWND hwnd , //handle to window UINT uMsg , //message indentfier WPARAM wParam , // message parameter LPARAM lParam ) { switch(uMsg) { case WM_CHAR:{ char st[20] ; sprintf(st,"char is %d",wParam); MessageBox(NULL ,st,"呵呵",0); break; //return 0; } case WM_LBUTTONDOWN:{ char wc[20] = "我勒个擦"; HDC hdc = GetDC(hwnd); TextOut(hdc,100,300,wc,strlen(wc)); ReleaseDC(hwnd,hdc); break; //return 0; } case WM_PAINT:{ PAINTSTRUCT pt; HDC hdcPaint = BeginPaint(hwnd,&pt); // pair; TextOut(hdcPaint,60,60,"我勒个去啊",strlen("我勒个去啊")); EndPaint(hwnd,&pt); //pair break; //return 0; } case WM_CLOSE:{ if(IDYES==MessageBox(hwnd,"是否真的结束？","weixin",MB_YESNO)) { DestroyWindow(hwnd); } break; //return 0; } case WM_DESTROY:{ PostQuitMessage(0); break; } default:{ return DefWindowProc(hwnd,uMsg,wParam,lParam); } } return 0;}int WINAPI WinMain( HINSTANCE mainInstance , //handle current instance HINSTANCE hPreviousInstance , // handle previous instance LPSTR lpCmdLine , // command line int nCmdShow // show state ){ WNDCLASS w; w.cbClsExtra = 0; w.cbWndExtra = 0; w.hbrBackground = (HBRUSH)GetStockObject(DKGRAY_BRUSH); w.hInstance = mainInstance ; w.hCursor = LoadCursor(NULL, IDC_ARROW); w.hIcon = LoadIcon(NULL, IDI_APPLICATION ); w.lpfnWndProc = MainProc ; w.lpszClassName = " First window " ; w.lpszMenuName = ""; w.style = CS_VREDRAW | CS_HREDRAW ; if (!RegisterClass(&w)){ //注册窗口类 . MessageBox(NULL, TEXT("Error !"),"test",MB_ICONERROR) ; return 0; } //创建窗口 HWND hMyWindow; hMyWindow = CreateWindow( " First window " , // lpClassName " window name " , // lpWindowName WS_OVERLAPPEDWINDOW , // window style 50 , // x 50 , // y 600 , // w 800 , // h NULL , // parent window NULL , // menu mainInstance , // handle current instance NULL // lpParam may be NULL if no additional data is needed. ); //显示窗口 ShowWindow(hMyWindow,SW_SHOWNORMAL); //更新窗口 UpdateWindow(hMyWindow); // 消息循环 MSG msg ; while (GetMessage(&msg ,NULL , 0 ,0 )){ TranslateMessage(&msg); //转换信息 DispatchMessage(&msg); //发送信息 } return 0;}