EditMask, MultiLineEdit, SingleLineEdit controls
The TextCase property lets you constrain the case of text entered by the user. The text can be displayed as the user types it, as all lowercase, or as all uppercase.
To select the case used to display text entered by users:
Select the desired text case from the TextCase drop-down list on the General tag page in the control’s Properties view.
The TextCase property takes a value of the TextCase enumerated datatype. The following line sets the case for a MultiLineEdit to all uppercase:
mle_1.TextCase = Upper!