keycodes

[juggernot]

I'm trying to make a program where, depending on what keys you press, a button will move a certain direction. I'd like some help using keycodes. I'm just playing around with them, never used them before. So far I can't get them to work.Right now my code looks like this:

Private Sub Form1_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles MyBase.KeyDown

If e.KeyCode = Keys.A Then
Varleft = true
ElseIf e.KeyCode = Keys.B Then
Varright = true
End If

Than, in a timer I have the following code:

If Varleft = True Then
Me.Button1.left += -2
ElseIf Varright = True Then
Me.Button1.left += 2

 

[Raven65]

I'm not sure what your question is here? Are you using the code above and the move is not happening? Are you getting an error, or just no action at all?

 

[LeonR]

Does the form have focus?

If so, you could try using the keypress event.

 Private Sub Form1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles Me.KeyPress
        If e.KeyChar = "a" Then MySub()
    End Sub

I think that should work? Then in the sub, do you stuff...
You could maybe create a variable, which could equal 1 for left and 2 for right?
Then call the sub at the end of keypress, if no matches, set it to 0 or dont call the sub etc
In the sub, check the var and do the required action accordingly?

I used a integer, as im not sure if you are planning on adding more keys.

Hope that helps

 

[juggernot]

nothing happens at all with my code, raven. I'm going to check to see if what Leon said can help me out.

 

[JohnH]

juggernet, you are handling keydown event for the form, this requires the form to have focus, and not any control on that form. There exist a form property KeyPreview that may help you, it got this description:

Gets or sets a value indicating whether the form will receive key events before the event is passed to the control that has focus.

 

[juggernot]

thanks a lot! That fixed my problem....for now. I'll keep you posted.