WIN32下 直接显示DIALOG 窗口不出现的怪问题

[cayido]

代码如下:其实一开始只要求在WIN32下直接实现出现我定制好的DIALOG IDD_CHAT而已,但是hDlg有值但是窗口却不显示,不知是何原因

int APIENTRY _tWinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPTSTR lpCmdLine,
int nCmdShow)
{
UNREFERENCED_PARAMETER(hPrevInstance);
UNREFERENCED_PARAMETER(lpCmdLine);
MSG msg;
LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
LoadString(hInstance, IDC__CHAT, szWindowClass, MAX_LOADSTRING);
HWND hDlg = CreateDialog(hInstance,(LPCTSTR)(IDD_CHAT),NULL,(DLGPROC)Chat);
if(! hDlg){
ShowWindow(hDlg, nCmdShow);
UpdateWindow(hDlg);
}

// Main message loop:
while (GetMessage(&msg, NULL, 0, 0))
{
if (IsDialogMessage(hDlg,&msg) )
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}

return (int) msg.wParam;
}

对应的回调函数Chat:

LRESULT CALLBACK Chat(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
//UNREFERENCED_PARAMETER(lParam);
switch (message)
{
case WM_INITDIALOG:
return (INT_PTR)TRUE;

case WM_COMMAND:
if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL)
{
EndDialog(hDlg, LOWORD(wParam));
return (INT_PTR)TRUE;
}
break;
}
return (INT_PTR)FALSE;
}

hDlg有值,但是我showWINDOW不出来 我的环境是VS2005
第一个解决的我会给所有的分,谢谢了

[liuxiuk]

HWND hDlg = CreateDialog(hInstance,(LPCTSTR)(IDD_CHAT),NULL,(DLGPROC)Chat);
----
HWND hDlg = CreateDialog(hInstance,MAKEINTRESOURCE(IDD_CHAT),NULL,(DLGPROC)Chat);

//IDD_CHAT是你对话框的ID

[cayido]

没用 2种都试过了 这种我早就试过了

[liuxiuk]

你trace下hDlg看看..

[flypig917]

HWND hwnd;
MSG msg;
hwnd=CreateDialog(hInstance,(char *)IDD_CHAT,0,Chat);
ShowWindow(hwnd,SW_SHOW);
while(GetMessage(&msg,NULL,0,0))
{
if(!IsDialogMessage(hwnd,&msg))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
return 0;

[cayido]

根源是CREATE失败 但是我不知道失败的原因 上面就换个CHAR* 怎么可能对

[cayido]

MSG msg;
HWND hWnd;

hInst = hInstance; // Store instance handle in our global variable
hWnd = CreateDialog( hInstance,
(LPCTSTR)( IDD_MAIN ),
NULL,
(DLGPROC)MainProc );
if ( NULL == hWnd)
{
MessageBox( NULL, "Create Window Error!", "ERROR", MB_OK );
return FALSE;
}

// SetWindowPos( hWnd,
// HWND_TOP,
// 250, 200, 0, 0,
// SWP_NOSIZE | SWP_SHOWWINDOW );
ShowWindow(hWnd, SW_SHOW);
UpdateWindow( hWnd );

// Main message loop:
while (GetMessage(&msg, NULL, 0, 0))
{
if( !::IsDialogMessage( hWnd, &msg ) )
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}

return msg.wParam;

别人给我可以显示出来的..
我怎么就不行 郁闷

[xiaoQ008]

楼主
我帮你改了下
你试下
#include <windows.h>
#include "resource.h"
LRESULT CALLBACK Chat(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam);
int WINAPI WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPTSTR lpCmdLine,
int nCmdShow)
{
MSG msg;
HWND hWnd;

// hInst = hInstance; // Store instance handle in our global variable
hWnd = CreateDialog( hInstance,
MAKEINTRESOURCE( IDD_CHAT ),
NULL,
(DLGPROC)Chat);
if ( NULL == hWnd)
{
MessageBox( NULL, "Create Window Error!", "ERROR", MB_OK );
return FALSE;
}

// SetWindowPos( hWnd,
// HWND_TOP,
// 250, 200, 0, 0,
// SWP_NOSIZE | SWP_SHOWWINDOW );
ShowWindow(hWnd, SW_SHOW);
UpdateWindow( hWnd );

// Main message loop:
while (GetMessage(&msg, NULL, 0, 0))
{
if( !::IsDialogMessage( hWnd, &msg ) )
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}

return msg.wParam;

}



LRESULT CALLBACK Chat(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
//UNREFERENCED_PARAMETER(lParam);
switch (message)
{
case WM_INITDIALOG:
return TRUE;

case WM_COMMAND:
switch(LOWORD(wParam))
{
case IDOK:
case IDCANCEL:
EndDialog(hDlg,0);
}
break;
}
return FALSE;
}

[cayido]

前面打错了 我ShowWindow写的是ShowWindow(hDlg, SW_SHOW);

[chehw]

if (IsDialogMessage(hDlg,&msg) ) continue;
TranslateMessage(&msg);
DispatchMessage(&msg);

[cayido]

我刚发现是我CREATEDIALOG 返回地址是0x000000 好像创建没成功 WHY
应该不是消息环的问题 因为窗口还没显示出来

[linlan999]

对话框资源头文件加到工程了没？？？？？？？？？／

[linlan999]

if(! hDlg){
ShowWindow(hDlg, nCmdShow);
UpdateWindow(hDlg);
}

－－－＞
if( hDlg){
ShowWindow(hDlg, nCmdShow);
UpdateWindow(hDlg);
　　　　　｝

[cayido]

CREATEDIALOG 返回无效窗口句柄 怎么办? 问题发现了但是 我不知道错在哪

[cayido]

我也不清楚原因 大家每人一分吧 我重新开了个项目 代码COPY了一下竟然好了

[cayido]

我12楼发的本来就是好的 1楼的才是坏的

[xiaoQ008]

那你发这个贴是有何用意?

[chehw]

尔先GetLastError()看一下出错码。

可能的原因有:
1、对话框的style设置成了WS_CHILD
2、对话框中用了common controls(如listview)控件，但在WinMain中未调用InitCommonControlsEx
3、对话框中用了RichEdit控件，但在WinMain中未LoadLibrary
4、其他

[chehw]

“尔”应改成“你”