Use windowless controls whenever possible. These controls process messages faster and draw faster than their windowed counterparts.
When you are developing your iFIX pictures and developing any new controls, remember that windowless controls go behind shape objects in your displays; windowed controls will never go behind iFIX shapes. You can use this information to test whether a control is windowed or windowless.
To test a control:
- Place the control in a picture.
- Draw a rectangle in the same picture.
- Select the control and then, in Classic view, select Send to Back from the Format menu. In Ribbon view, on the Format tab, in the Arrange group, click Arrange, and then click Send to Back.
If the control goes behind the rectangle, it is a windowless control. If the control stays on top of the rectangle even after you have selected the Send to Back command, then the control is windowed.
