This is the sample application helps you to do alpha blending the bitmap on camera streaming in Windows Embedded Compact 7 & Windows Embedded Compact 2013 using Directshow Video Mixer Renderer (VMR). It is a VS2008(For WEC7)/VS2012 (WEC2013) based smart
device project developed on C++. I have explained the sample application in the following blog link.
Exploring VMR Features on WEC7