I had the same problem in VFP9 version 09.00.0000.2412, and was surprized that the messagebox eats the click. To get around it, I do a keyboard '{enter}' in the gotfocus of the button if the button is clicked coming from the text box.

>Running vfp9 on WinXP SP2.
>
>When I have a messagebox in a textbox valid, and, with the textbox having focus, I click on a button, the button's click event doesn't fire. Is this a bug, or is it supposed to happen this way?
>
>Here is some simple code. Note that if you change command1.click to command1.rightclick, the rightclick event will fire which makes me lean toward it being a bug.
>
>I thought it might make a difference if the messagebox didn't have to be closed manually, so I tried changing the

MessageBox("TextBox Valid")

to be

MessageBox("TextBox Valid",0,2000)

But it makes no difference. The button click doesn't fire.
>
>Anybody?
>

>oForm = CREATEOBJECT("Form1")
>oForm.Show
>READ events
>
>RETURN
>
>DEFINE CLASS form1 AS form
>  DoCreate = .T.
>  Caption = "Form1"
>  Name = "Form1"
>
>  ADD OBJECT text1 AS textbox WITH ;
>    Height = 23, ;
>    Left = 96, ;
>    Top = 48, ;
>    Width = 100, ;
>    Name = "Text1"
>
>  ADD OBJECT command1 AS commandbutton WITH ;
>    Top = 120, ;
>    Left = 96, ;
>    Height = 27, ;
>    Width = 84, ;
>    Caption = "Command1", ;
>    Name = "Command1"
>
>  Procedure Destroy
>    Clear Events
>  ENDPROC
>	
>  PROCEDURE text1.Valid
>    MessageBox("TextBox Valid")
>  ENDPROC
>
>  PROCEDURE command1.Click
>    MESSAGEBOX("button click")
>  ENDPROC
>
>ENDDEFINE
>