property ExSkinForm.ImageTitle as Variant
Specifies the image being displayed in the window's title bar.

TypeDescription
Variant A string expression that indicates a path to a picture file, a string expression that holds a picture object in BASE64 encoded format. Use the eximages tool to save your picture as base64 encoded format.  
Use the ImageTitle property to assign a new picture to the form's caption. The form's icon is not the same thing. The form's icon goes to HTSYSMENU area. The ImageTitle picture goes to HTTITLE area. Use the form/container's Caption property to specify the form's caption.