new biw : Problem in generating a child window

[madhavilt]

hi,
I am a newbie to PPC technology.Along with my learning, I am creating some sample applications.I tried to create one sample application to generate a child window by clicking a button"main" in main window.I followed one modeless sample given with SDK.
the code is :


void CMainDlg::OnMain()
{
// TODO: Add your control notification handler code here


CChilddlg* m_pchild;
m_pchild = NULL;
if(m_pchild == NULL) {
m_pchild = new CChilddlg(this);
if(m_pchild->Create(1,NULL) == TRUE)
GetDlgItem(IDC_MAIN)->EnableWindow(FALSE);
}
else
m_pchild->SetActiveWindow();

}

now m_pchild->Create(1,NULL) is returning false.and my application is returning nothing instead of generating a child window.
can any one please help me.

Thanks in advance,
madhavi

 

[apatterno]

In the line Create(1,NULL)... the first parameter is supposed to be the ID of the dialog! You should set this to CChildDlg::IDD, which is a constant that represents the child dialog's ID.

--------------
And also:

m_pchild = NULL;
if(m_pchild == NULL) {

The preceding lines in your code are pointless.

Will

 

[madhavilt]

thanks for ur reply.I got my mistake.I did the required modifications still I am not getting.
this is the code :

void CMainDlg::OnMain()
{
// TODO: Add your control notification handler code here

if(m_pchild == NULL) {
AfxMessageBox(TEXT("no child window is active&quot);
m_pchild = new CChilddlg(this);
if(m_pchild->Create(IDD_CHILD_DIALOG,NULL) == TRUE)
GetDlgItem(IDC_MAIN)->EnableWindow(FALSE);
else AfxMessageBox(TEXT("FALSE : failed to create a child window&quot);
}
else {
AfxMessageBox(TEXT("Child window is active&quot);
m_pchild->SetActiveWindow();
}

}

just to check the control flow I kept messagebox.Now when I am, clicking on mian button, instead of generating a child window, message box is appearing with message "Child window is active" in the first step itself.

anyone please help where I did the mistake..

thanks in advance,
madhavi

 

[apatterno]

m_pChild->ShowWindow(SW_SHOW) must be called unless the dialog resource has the WS_VISIBLE style

 

[madhavilt]

thanks alot for ur reply apatterno.Now it is working.
thanks,
madhavi