Thread: Problem with Dialog Box

I'm making a DialogBox using DialogBoxIndirect() and when I close the dialog window the entire application closes.

Is there a reason why EndDialog() would close the entire application? If there is what would cause it? If not what could be the problem?

Thanks,
Joe

I haven't tried it before, but it might be possible that EndDialog() is being passed the HWND to your main window? I could be wrong but it might be able to destroy normal window. Correct me please if I am.

Thats the only guess I could come up with based on info provided.

Why not post some code so we can take a look and try to actually see whats going on?

Tyouk

I have checked if EndDialog() is getting the handle of the main window and it is not. I even tried forcing the handle of the main window in EndDialog() and it didn't do anything

For the complete source go to http://members.rogers.com/deacon12/windex.zip

I didn't include this code because I thought it might complicate things. Any variables that are not defined are defined in the cWINDOWS class.

Code:

class cDIALOG: public cWINDOW
{
private:
	static cDIALOG	*Me;
	static cSTRING	*sCaption;	

	static BOOL CALLBACK DlgProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam);
public:
	~cDIALOG()
	{ Close(); }

	int Create(HWND hParent, cSTRING sCaption,
				int cx, int cy, int x=0, int y=0, 
				DWORD dwStyle=0, DWORD dwExStyle=0);

	void Close(int nResult=0)
	{ ChildWindow.ForEach(del_all); ChildWindow.Clear(); EndDialog(hwnd, nResult); }
//ChildWindow is a linked list structure. This structure has been tested and it work correctly

	void OnCreate(void (*Function)())
	{ WindowEvents[0].unEvent=WM_INITDIALOG; WindowEvents[0].Function=Function; }
};

Code:

int cDIALOG::Create(HWND hParent, cSTRING sCaption,
					int cx, int cy, int x, int y,
					DWORD dwStyle, DWORD dwExStyle)
{
	HGLOBAL			hGlobal;
	LPDLGTEMPLATE	Dlg;
	cDIALOG			*PrevDlg=Me;
	cWINDOW			*PrevObj=Objects;

	if ( !(hGlobal=GlobalAlloc(GMEM_ZEROINIT, 1024)) )
		return -1;

	Dlg=LPDLGTEMPLATE(GlobalLock(hGlobal));

	Dlg->cdit=0;
	Dlg->cx=cx;
	Dlg->cy=cy;
	Dlg->dwExtendedStyle=dwExStyle;
	Dlg->style=dwStyle;
	Dlg->x=x;
	Dlg->y=y;

	GlobalUnlock(hGlobal);
	Me=this; //Incase there are more than one dialog box created
	Objects=this; //The objects on the window that can be create are subclassed and the sub-class function needs to be static
	this->sCaption=&sCaption;
	int nReturn=DialogBoxIndirect(AppInstance, Dlg, hParent, DlgProc);
	Me=PrevDlg; //restore old window's handle
	Objects=PrevObj; //restore old object's address
	GlobalFree(hGlobal);

	return  nReturn;
}

Code:

BOOL CALLBACK cDIALOG::DlgProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	if ( message==WM_INITDIALOG )
		Me->SetText(*sCaption);
	
	cCHILDWINDOW **TempChild;
	cLINKEDLIST<cCHILDWINDOW*> *ChildWindow=&Me->ChildWindow;

	ChildWindow->StepReset();
	while ( (TempChild=ChildWindow->GetNode()) )
	{
		if ( (*TempChild)->ProcessParent(hwnd, message, wParam, lParam) )
			return 0;
		
		ChildWindow->StepNext();
	}

	if ( Me->ProcessEvents(hwnd, message, wParam, lParam) )
		return 1;
	
	else if ( message==WM_CLOSE )
		Me->Close();

	return 0;
}

Any help would be greatly appreciated
-Joe

Sorry, I can't. I've never bothered to learn C++ yet. Waiting till I master C before I move on.

Tyouk