Process class?

[cheng_sh]

I'm learning on how to use the Process class. I create a form and during the form load, I'd like to open the notepad as well. See my code below.

My problem is: After open the notepad, is it possible to get the handle of the notepad through process.Handle property?

I try the code as below but error occur as it come to
hwnd = myproc.Handle

Error :
An unhandled exception of type 'System.InvalidOperationException' occurred in system.dll

Additional information: No process is associated with this object.


Can anybody tell me how to get its handle?


Thank you.

  Inherits System.Windows.Forms.Form
  Dim WithEvents myproc As System.Diagnostics.Process
  Dim hwnd As IntPtr

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
    myproc = New System.Diagnostics.Process()
    ' Do not receive an event when the process exits.
    myproc.EnableRaisingEvents = True ' False
    ' Start Notepad, and assign it to the process component.    
    myproc.Start("Notepad.exe")

    ' This prevents the window from accepting a close before it has
    ' fully opened.
    'myproc.WaitForInputIdle()
    hwnd = myproc.Handle
  End Sub

 

[AndreRyan]

hWnd s are for windows not applications. Does notepad actually start?

 

[Derek Stone]

Your code should read:

myproc = Process.Start("notepad")

As it stands now you have no application associated with your Process object.

 

[cheng_sh]

Thank you. I got it.