You can use the ImageHeight property in Visual Basic to determine the height in twips of the picture in an image control.
Setting
The ImageHeight property is an Integer value equal to the height of a picture in twips.
This property is read-only in all views.
Remarks
You can use the ImageHeight property together with the ImageWidth property to determine the size of a picture in an image control. You could then use this information to change the image control's Height and Width properties to match the size of the picture displayed.