How to Fix Missing Crystal Reports Viewer In Toolbox for Visual Studio 2010
Crystal Reports has long been associated with Visual Basic, and Visual Studio, I used it way back in 1994 along with Visual Basic.
But it does not always appear in the toolbox for Visual Studio 2010. This happened to me a few times, and I find the following steps always fix it.
This is the answer, in Project properties\compile\advanced compile options, if the settings is .net Frame Work 4.0 Client Profile then it needs to change to .net Frame Work 4.0
Below is the corrected settings, (corrected that is if you need Crystal Reports Viewer control in your toolbox)