C program is compiled and converted into .dll using cygwin compiler.In python scripting it can be loaded using ctypes and call the functions successfully.But I import that python scripting as libraray into Robot Framework Automation tool,it cant load that .dll file and the test case also failed.
is the cygwin created dll file not be supported by RTF?
Can anyone suggest any other method for that?
Given our discussion in the comments. You can't mix and match like this. The format that Cygwin builds a DLL in is different that the format Windows expects a DLL in. You need to build and run all in one environment.