public delegate int CvErrorCallback(
	int status,
	IntPtr funcName,
	IntPtr errMsg,
	IntPtr fileName,
	int line,
	IntPtr userData
)

Public Delegate Function CvErrorCallback ( 
	status As Integer,
	funcName As IntPtr,
	errMsg As IntPtr,
	fileName As IntPtr,
	line As Integer,
	userData As IntPtr
) As Integer

public delegate int CvErrorCallback(
	int status, 
	IntPtr funcName, 
	IntPtr errMsg, 
	IntPtr fileName, 
	int line, 
	IntPtr userData
)

type CvErrorCallback = 
    delegate of 
        status : int * 
        funcName : IntPtr * 
        errMsg : IntPtr * 
        fileName : IntPtr * 
        line : int * 
        userData : IntPtr -> int