C # Check whether the subwindow is enabled

Code ///   <Summary>
/// Check window enabled?
///   </Summary>
///   <Param name = "sfromclassname"> Name of the window class to be detected </Param>
///   <Returns> Indicates whether the window is opened and activated. </Returns>
Private   Bool Checkformisopen ( String Sfromclassname)
{
Foreach (Form childrenform In   This . Mdichil.pdf)
{
// Check whether the current subform name is used
If (Childrenform. Name = Sfromclassname)
{
// If yes, display it.
Childrenform. Visible =   True ;
// Activate the desired form
Childrenform. Activate ();
Return   True ;
}
}
Return   False ;
}