Tab controls
When RaggedRight is enabled, tab size is determined by the label text and the Fixed Width setting. If RaggedRight is not enabled, tabs are stretched so that they fill space along the edge of the control.
To set the RaggedRight property:
Select the Ragged Right check box on the General page of the tab control’s Properties view.
When this check box is selected, the tabs are sized based on their label text and whether the Fixed Width check box is selected.
The RaggedRight property takes a boolean value. The following line specifies that tabs are stretched to fill the edge of the control:
tab_1.RaggedRight = FALSE