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Unit 3: Understanding Controls and Control Events

Top
Sets the Y coordinate of the Command Button.

Use MaskColor
If set to True, the MaskColor property will be used as the transparent color in the picture used
on the Command Button. See the MaskColor property for information.
Visible
Determines whether the Command Button appears on the Form. I.e. if set to False, the Command
Button will be unavailable to the user - even by trying to set focus to it with the tab key.
Width

Sets the width of the Command Button.
3.4.4.2 Methods

Move
Left As Single, [Top], [Width], [Height]

This method changes the position and optionally the size of the Command Button. The following
example will move the Command Button to the top-left of the Form and makes it into a square:
Command1.Move 0, 0, 375, 375 SetFocus

Sets the focus to the Command Button. This means that pressing the Enter key will activate the
Click event, even if another Command Button has it’s Default property set to True.

3.4.4.3 Events
Click

This is probably the most important event for the Command Button. It occurs when the user
clicks on the Command Button, or activates it in another way e.g. with the Enter key, Space key,
Alt+[Underlined Letter] or Escape key depending on the properties of the Command Button.

Private Sub Command1_Click()
Text3.Text = CStr(Val(Text1.Text) + Val(Text2.Text))

End Sub

GotFocus
Occurs when the Command Button gets focus either from the Tab key, when it is clicked on by
the user or by using the SetFocus method.
KeyDown and KeyUp
KeyCode As Integer, Shift As Integer

When the user presses a keyboard key down or releases a key, these events occur.

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