Emgu CV Library Documentation
cvRedirectError Method (errorHandler, userdata, prevUserdata)
NamespacesEmgu.CVCvInvokecvRedirectError(IntPtr, IntPtr, IntPtr)

www.emgu.com/wiki
Sets a new error handler that can be one of standard handlers or a custom handler that has the certain interface. The handler takes the same parameters as cvError function. If the handler returns non-zero value, the program is terminated, otherwise, it continues. The error handler may check the current error mode with cvGetErrMode to make a decision.
Declaration Syntax
C#Visual BasicVisual C++
public static IntPtr cvRedirectError(
	IntPtr errorHandler,
	IntPtr userdata,
	IntPtr prevUserdata
)
Public Shared Function cvRedirectError ( _
	errorHandler As IntPtr, _
	userdata As IntPtr, _
	prevUserdata As IntPtr _
) As IntPtr
public:
static IntPtr cvRedirectError(
	IntPtr errorHandler, 
	IntPtr userdata, 
	IntPtr prevUserdata
)
Parameters
errorHandler (IntPtr)
Pointer to the new error handler
userdata (IntPtr)
Arbitrary pointer that is transparetly passed to the error handler.
prevUserdata (IntPtr)
Pointer to the previously assigned user data pointer.
Return Value

[Missing <returns> documentation for M:Emgu.CV.CvInvoke.cvRedirectError(System.IntPtr,System.IntPtr,System.IntPtr)]

Assembly: Emgu.CV (Module: Emgu.CV) Version: 1.5.0.0 (1.5.0.0)