MFC Dialog: How to start your dialog application in hidden mode?
Sat, 24/02/2007 - 10:39 — admin
Recommended Reading :
Q: How to start your dialog application in hidden mode?
A: If you put the function 'ShowWindow(SW_HIDE)' in your 'OnInitDialog()', it won't have any effect, because 'OnInitDialog()' always finishes with calling 'ShowWindow(SW_SHOW)'. But there is a workaround for that. Create a 'BOOL' member variable into your dialog class and set it to 'FALSE' in the constructor.
class CYourDialog : public CDialog
{
...
private:
BOOL m_visible;
};
CYourDialog::CYourDialog(CWnd* pParent /*=NULL*/)
: CDialog(CYourDialog::IDD, pParent)
{
//...
m_visible = FALSE;
}
{
...
private:
BOOL m_visible;
};
CYourDialog::CYourDialog(CWnd* pParent /*=NULL*/)
: CDialog(CYourDialog::IDD, pParent)
{
//...
m_visible = FALSE;
}
Now override the 'WM_WINDOWPOSCHANGING' message handler. Your code should look something like this to hide the dialog:
void CYourDialog::OnWindowPosChanging(WINDOWPOS FAR* lpwndpos)
{
if(!m_visible)
{
lpwndpos->flags &= ~SWP_SHOWWINDOW;
}
CDialog::OnWindowPosChanging(lpwndpos);
}
{
if(!m_visible)
{
lpwndpos->flags &= ~SWP_SHOWWINDOW;
}
CDialog::OnWindowPosChanging(lpwndpos);
}
To make the dialog again visible, use the following code:
//...
m_visible = TRUE;
ShowWindow(SW_SHOW);
//...
m_visible = TRUE;
ShowWindow(SW_SHOW);
//...
Note: Most of the material in this article is taken from codeguru.com
Recommended Reading :
Bookmark Us
Who's new
- rtgramesh1
- donnalley
- jimh47
- lakshmi.sudhan
- maxiim