怎么显示不出来?

[热烈的红颜]

#include<Windows.h>
#include<iostream.h>
LRESULT CALLBACK WindowFProc(HWND hWnd,UINT uMsg,WPARAM wParam,LPARAM lParam); 
int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance, LPSTR lpCmdLine,int nCmdShow)
{
  WNDCLASS wndclass;
  wndclass.hInstance=hInstance;
  wndclass.cbClsExtra=0;
  wndclass.cbWndExtra=0;
  wndclass.hCursor=LoadCursor(hInstance,IDC_CROSS);
  wndclass.lpfnWndProc=WindowFProc;
  wndclass.hIcon=LoadIcon(hInstance,IDI_ERROR); 
  wndclass.hbrBackground=(HBRUSH)GetStockObject(GRAY_BRUSH);
  wndclass.lpszClassName="SimpWClass";
  wndclass.lpszMenuName=NULL;
  wndclass.style=CS_HREDRAW|CS_VREDRAW;
  RegisterClass(&wndclass);
  
  HWND hwnd;
  hwnd=CreateWindow("szWindowClass","第一个窗口",WS_OVERLAPPEDWINDOW ,
	  CW_USEDEFAULT, 0, CW_USEDEFAULT, 0,NULL,NULL,hInstance,NULL);
  ShowWindow(hwnd,SW_SHOWNORMAL);
  UpdateWindow(hwnd); 
  MSG msg;
  while(GetMessage(&msg,hwnd,0,0)){
   TranslateMessage(&msg);
   DispatchMessage(&msg);
  }
  return 0;
}
LRESULT CALLBACK WindowFProc(HWND hWnd,UINT uMsg,WPARAM wParam,LPARAM lParam){
    switch(uMsg){
	case WM_CHAR:
		break;
	case WM_PAINT:
	   PAINTSTRUCT  paintStruct;
       HDC hdc;
	   hdc = BeginPaint(hWnd,&paintStruct);
	   EndPaint(hWnd,&paintStruct);
	   break;
	case WM_CLOSE:
		break;
    case WM_DESTROY:
			PostQuitMessage(0);
			break;
	default:
		DefWindowProc(hWnd,uMsg,wParam,lParam);
	}
	return 0;
}

[stone_clock]

wndclass.lpszClassName="SimpWClass";
跟
CreateWindow("szWindowClass"
要一样吧。

[热烈的红颜]

还是 不可以

[lzr4304061988012]

LRESULT CALLBACK WindowFProc(HWND hWnd,UINT uMsg,WPARAM wParam,LPARAM lParam); 
int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance, LPSTR lpCmdLine,int nCmdShow)
{
  WNDCLASS wndclass;
  wndclass.hInstance=hInstance;
  wndclass.cbClsExtra=0;
  wndclass.cbWndExtra=0;
  wndclass.hCursor=LoadCursor(hInstance,IDC_CROSS);
  wndclass.lpfnWndProc=WindowFProc;
  wndclass.hIcon=LoadIcon(hInstance,IDI_ERROR); 
  wndclass.hbrBackground=(HBRUSH)GetStockObject(GRAY_BRUSH);
  wndclass.lpszClassName="SimpWClass";
  wndclass.lpszMenuName=NULL;
  wndclass.style=CS_HREDRAW|CS_VREDRAW;
  RegisterClass(&wndclass);
  
  HWND hwnd;
  hwnd=CreateWindow("SimpWClass","第一个窗口",WS_OVERLAPPEDWINDOW ,
      CW_USEDEFAULT, 0, CW_USEDEFAULT, 0,NULL,NULL,hInstance,NULL);//这里第一参数窗口类名不对.
  ShowWindow(hwnd,SW_SHOWNORMAL);
  UpdateWindow(hwnd); 
  MSG msg;
  while(GetMessage(&msg,hwnd,0,0)){
   TranslateMessage(&msg);
   DispatchMessage(&msg);
  }
  return 0;
}
LRESULT CALLBACK WindowFProc(HWND hWnd,UINT uMsg,WPARAM wParam,LPARAM lParam){
    switch(uMsg){
    case WM_CHAR:
        break;
    case WM_PAINT:
       PAINTSTRUCT  paintStruct;
       HDC hdc;
       hdc = BeginPaint(hWnd,&paintStruct);
       EndPaint(hWnd,&paintStruct);
       break;
    case WM_DESTROY:
		PostQuitMessage(0);
       break;
    default:
       return  DefWindowProc(hWnd,uMsg,wParam,lParam);//对于未处理的消息,这里返回默认窗口处理程序
    }
    return 0;
}

[xiaocha]

很久没写中代码了，试一试这样，不知对否
hwnd=CreateWindow(
"SimpWClass",
"第一个窗口",
WS_OVERLAPPEDWINDOW ,
CW_USEDEFAULT,
CW_USEDEFAULT, // !!!
CW_USEDEFAULT,
CW_USEDEFAULT,
NULL,
NULL,
hInstance,
NULL);

[xmanlin]

hwnd=CreateWindow("SimpWClass","第一个窗口",WS_OVERLAPPEDWINDOW ,
CW_USEDEFAULT, 0, CW_USEDEFAULT, 0,NULL,NULL,hInstance,NULL); //你创建的窗口没有宽度

前两个是窗口位置, 后两个是窗口宽度和高度.

[热烈的红颜]

对了
return DefWindowProc(hWnd,uMsg,wParam,lParam);//对于未处理的消息,这里返回默认窗口处理程序
就着里 错误了

[xmanlin]

当然楼上说的你的想创建的窗口类名和你注册的不一样也是问题所在. 这样在你createwindow时报找错误类名错误