Intercepting Print Screen

How would I go about intercepting the print screen key while my application has focus? What I would like to do is have my program save the image on screen to a location on the hard drive. I already have code to take a screen shot and save it and it works just fine. The problem is I would like this to happen when the print screen key is pressed...

I've already tried using the KeyDown or KeyUp events to intercept the key, but that doesn't seem to work... Seems like I could intercept any key BUT that one. :-\

Subclassing will catch the keystroke. Add this class to the project:

VB Code:

Imports System.Windows.Forms
 
Public Class Subclassing
    Inherits System.Windows.Forms.NativeWindow
 
    'Event Declaration. This event will be raised when any Message will be posted to the Control
    Public Event CallBackProc(ByRef m As Message)
 
    'Flag which indicates that either Event should be raised or not
    Private m_Subclassed As Boolean = False
 
    'During Creation of Object of this class, Pass the Handle of Control which you want to SubClass
    Public Sub New(ByVal handle As IntPtr)
        MyBase.AssignHandle(handle)
    End Sub
 
    'To Enable or Disable Receiving Messages
    Public Property SubClass() As Boolean
        Get
            Return m_Subclassed
        End Get
        Set(ByVal Value As Boolean)
            m_Subclassed = Value
        End Set
    End Property
 
    Protected Overrides Sub WndProc(ByRef m As Message)
        If m_Subclassed Then 'If Subclassing Enabled then RaiseEvent
            RaiseEvent CallBackProc(m)
        End If
        'Setting the Msg member to 0 in the CallBackProc event means the code is handling the message
        'Used mainly for overriding textbox context menu
        If m.Msg > 0 Then MyBase.WndProc(m)
    End Sub
 
    Protected Overrides Sub Finalize()
        MyBase.Finalize()
    End Sub
End Class

Use it like this:

VB Code:

'In the form
Private WithEvents m_subclass As Subclassing
 
'In form's Load event:
 
m_subclass= New Subclassing(txtLDesc.Handle)
m_subclass.SubClass = True
 
'add this procedure to the form
Private Sub Callback(ByRef m As System.Windows.Forms.Message) Handles m_subclass.CallBackProc
 
    'handle PrntScr key
    If m.WParam.ToInt32 = 44 Then
 
    End If
 
End Sub

Hope I got it all. :)