TAB and Escape keys are not working in windows created using CreateDialog

[vinvino2001]

Hi, I have created modeless dialogs in MFC using CreateDialog() and dialog is successfully shown.

void ParentDialog::OnButton1()
{
// TODO: Add your control notification handler code here
HWND retcode = CreateDialogParam(NULL,
MAKEINTRESOURCE(IDD_DIALOG2),
NULL,
MainWndProc);
}

In message handler, added the following

int APIENTRY MainWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{

switch(uMsg)
{
case WM\_INITDIALOG: 
	ShowWindow(hwnd, SW\_SHOW);
	UpdateWindow(hwnd);
	return TRUE;
	break; 
	
case WM\_COMMAND: 
	if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL) 
	{ 
		DestroyWindow(hwnd);
		return TRUE;
	} 
	break; 
} 

return FALSE; 

}

After dialogs are displayed, when I am pressing hot keys or escape from the child dialogs, it is not working. Please help me. Thanks in advance. Vinoth