DisclosureTriangle.Value

From Xojo Documentation

Property (As Boolean )
aDisclosureTriangle.Value = newBooleanValue
or
BooleanValue = aDisclosureTriangle.Value

Supported for all project types and targets.

The orientation of the triangle.

Notes

True corresponds to downward; False corresponds to either left or right depending on the value of Facing.

Example

The following Action event changes it to a downward pointing triangle.

Me.Value = True