SpIsControlEnabled

This function returns the state (enabled/disabled) of the specified item in the dialog template within a dialog box.

Syntax: enabled = spIsControlEnabled ( hwndDlg, id )

Parameters:
 * hwndDlg – Dialog window handle.
 * id - Identity of the specified item.
 * Returns: True (1) – Specified item is enabled.
 * False (0) – Specified item is disabled.