We have some static libraries created long time back say 10/15 yrs back. We have build all the libraries in visual studio 2005. But when we create a managed C++ application and try to use classes from the static libraries , the application just crashes with no traces as to why did the application crash. Application crashes in dbgheap.c. the static libraries which we use have reference to ATL as well. With the same set of project settings if a create MFC application in Visual studio 2005 everything seems to be working fine. Questions: 1. Is it possible for managed C++ application to use static libraries , if yes then what is to be done. 2.What are the options use a static library in managed code.