MessageBox.Show Method (IWin32Window, String, String)
Displays a message box in front of the specified object and with the specified text and caption.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
An implementation of IWin32Window that will own the modal dialog box.
The text to display in the message box.
The text to display in the title bar of the message box.
You can use the owner parameter to specify a particular object, which implements the IWin32Window interface, that will serve as the dialog box's top-level window and owner. A message box is a modal dialog box, which means no input (keyboard or mouse click) can occur except to objects on the modal form. The program must hide or close a modal form (typically in response to some user action) before input to another form can occur.
By default, the message box displays an OK button.
Available since 1.1