Capture a scrolling window contents screenshot

Question

I need to capture a screenshot of the scrolling window\'s client area, using .NET. My first priority is capturing web page screenshots. But this can be not the only one use

Answer 1

Have you looked at Snagit? http://www.techsmith.com/download/accessories/default.asp

Also, here's a c# utility that seems to do what you're asking for: http://www.codeproject.com/KB/graphics/IECapture.aspx

Answer 2

I've continued my search and founded IECapt, — an open source tool which can take a web page screenshot using IE inside of it. It has С++ and .NET versions. Also there are Qt/WebKit-based analog from the same author: http://cutycapt.sourceforge.net.

This tools is not a direct answer for my question, but both of them solve the original problem by 90%.

Answer 3

You can get windows to redirect a WM_PAINT to an offscreen buffer with WM_PRINT and WM_PRINTCLIENT. This is better than screenscraping because it makes sure that obscured parts of a window(behind other windows) is painted anyway. If your target window scrolls by scrolling a child window position, WM_PRINT should apply. Just maybe it also helps your scenario.