The wglGetCurrentContext function obtains a handle to the current OpenGL rendering context of the calling thread.
HGLRC wglGetCurrentContext(VOID);This function has no parameters.
If the calling thread has a current OpenGL rendering context, wglGetCurrentContext returns a handle to that rendering context. Otherwise, the return value is NULL.
The current OpenGL rendering context of a thread is associated with a device context by means of the wglMakeCurrent function. You can use the wglGetCurrentDC function to obtain a handle to the device context associated with the current OpenGL rendering context.
Windows NT: Use version 3.5 and later.
Windows: Use Windows 95 and later.
Windows CE: Unsupported.
Header: Declared in wingdi.h.
Import Library: Link with opengl32.lib.
OpenGL on Windows NT and Windows 95 Overview, WGL Functions, wglCreateContext, wglDeleteContext, wglGetCurrentDC, wglMakeCurrent