Disable the cancel option via the "X" button in the titlebar, during installation

[yaniv_av]

Hi,

I'm using basic MSI project.
I want to prevent any option to cancel the installation in the "Setup Progress" dialog.
I can hide the "cancel" button, but the user can still press the "X" button in the dialog's titlebar.
Is it possible to hide/disable this "X" in the titlebar?
If not, is there any way to override the default behavior and not to cancel the installation? (via some custom action for example)

Thanks!

[yaniv_av]

Ok.
This can be done by the folloing custom action code:

HWND hwndSetupDialog = GetForegroundWindow();
HMENU hwndMenu = GetSystemMenu(hwndSetupDialog, FALSE);
RemoveMenu(hwndMenu, SC_CLOSE, MF_DISABLED | MF_BYCOMMAND);
DrawMenuBar(hwndSetupDialog);