It looks to me like Snagit accomplishes a scrolling window capture this way:
1. Identify the window.
2. Compute the height/width dimensions necessary to display the entire window without scroll bars.
3. Change the target window's dimensions to match.
4. Capture the image.
5. Restore the target window's original dimensions.
It looks to me like Snagit accomplishes a scrolling window capture this way:
1. Identify the window.
2. Compute the height/width dimensions necessary to display the entire window without scroll bars.
3. Change the target window's dimensions to match.
4. Capture the image.
5. Restore the target window's original dimensions.