Setting the title of a custom dialog box in an InstallScript or InstallScript MSI project is easy. That is if you can find the needed function in the InstallShield Help. Don’t laugh. It’s not that easy to find.
The function to use is SetWindowText(). Here is an example:
// get the dialog’s window handle
hwndDlg = CmdGetHwndDlg (szDialogName);
// set the custom dialog box window title
SetWindowText (hwndDlg, “Select Options”);
You first must call CmdGetHwndDlg() to get the handle to the dialog box. Then, just call SetWindowText() with the dialog handle and the title.