Button Examples

Example 1. Disable or enable a button.

//Check whether a password has been entered

IF edPassword == ""

{

btEnter.Disable()

}

ELSE

{

btEnter.Enable()

}

Note:

edPassword – a Form control, edit control used password entry field.
btEnter – a Form control, button.
A disabled button will appear shaded out on the form.
This expression could be executed upon every text change in the edit control to make sure that a user cannot login with an empty password.

Example 2. Show or hide a button.

IF boolShow == false

{

btEnter.Hide()

}

ELSE

{

btEnter.Show()

}

Note:

boolShow – a Form Variable, used as a flag in this instance to check whether to display or hide the button.
btEnter – a Form control, button.
The button will not be visible on the form when it is hidden.

Example 3. Set focus on a button.

btEnter.SetFocus()

Note:

btEnter – a Form control, button.
Set Focus would usually be used when opening a form or when prompting the user to press the button. It is like setting the button to be the default button.