Form does not recieved arrow keys.

[aewarnick]

I have a form with one button on it. I have set KeyPreview to true so that the form first recieves all the keydown messages. The problem is that the button still recieves the arrow keys!!

 

Why is that? Can it be fixed?

 

I read somewhere that that was a .net 1 bug and was fixed in 1.1 but I installed 1.1 and it does not make a difference.

[divil]

See the IsInputKey method in MSDN, you'll have to override it.

[aewarnick]

Thanks divil. It was here too:

http://www.syncfusion.com/faq/winforms/search/544.asp

The famed faq!

[DiverDan]

Could someone please translate the C# code in VB.Net code?

 

Thanks

Dan

[aewarnick]

That code should be very easy to translate to VB .net code. If you can't figure it out, there are C# to VB .net translators on the net and vise versa.

[mutant]

Could someone please translate the C# code in VB.Net code?

 

Thanks

Dan

 

Its very simple translation :):

Protected Overrides Function IsInputKey(ByVal keyData As System.Windows.Forms.Keys) As Boolean
Select case keyData
   case Keys.Up
         return True
   case Keys.Down
         return True
   case Keys.Right
         return True
   case Keys.Left
         return True
End Select
MyBase.IsInputKey(keyData)
End Function

[DiverDan]

Thanks mutant,

 

I have another thread also dealing with this. After creating this and other override events and then using the keydown and key press events...nothing happens??? I'm really stuck on this one, please help!!!

 

keypreview is set to true.

 

Thanks

Dan

[aewarnick]

I didn't test with IsInputKey yet but I answered your post and am pretty sure it is correct.

[dynamic_sysop]

here ya go , took me a while of messing but i sussed it :)

   Private Const VK_UP As Integer = CInt(&H26)
   Private Const VK_RIGHT As Integer = CInt(&H27)
   Private Const VK_LEFT As Integer = CInt(&H25)
   Private Const VK_DOWN As Integer = CInt(&H28)


   Protected Overrides Function ProcessKeyPreview(ByRef m As System.Windows.Forms.Message) As Boolean

       Select Case m.WParam.ToInt32
           Case VK_UP
               MsgBox("up")
           Case VK_DOWN
               MsgBox("down")
           Case VK_LEFT
               MsgBox("left")
           Case VK_RIGHT
               MsgBox("right")
       End Select

   End Function

[aewarnick]

Thanks dynamic. I'll try it out some time.

[DiverDan]

Thanks also dynamic!!! This one drove me nuts and you got it!!

 

Dan

Edited July 17, 2003 by DiverDan