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USERFLT

typedef struct _USERFLT 
{ 
   L_UINT uStructSize; 
   L_UINT ufltWidth; /* number of columns in the user-defined array*/ 
   L_UINT ufltHeight; /* number of rows in the user-defined array */ 
   POINT ufltCenter; /* user-defined array reference point*/ 
   L_UINT ufltDivisor; /* Divide the result by this value*/ 
   L_INT nfltOffset; /* offset the result by this value */ 
   L_UINT ufltFlag; /* Flags */ 
   L_INT ufltMatrix[1]; /* array of (ufltWidth * ufltHeight) integers */ 
} USERFLT, * pUSERFLT;

Member	Description
uStructSize	Must contain the size of USERFLT structure. Should be set to sizeof(USERFLT).
ufltWidth	Number of columns in the user-defined array (mask).
ufltHeight	Number of rows in the user-defined array (mask).
ufltCenter	Any two-dimensional position of the array (ufltMatrix), to be used as the matrix (mask)center.
ufltDivisor	Value used to divide the final result of the output. This must be a non-zero value. If you want to use floating point values for the matrix elements and the divisor, multiply the matrix elements and the divisor with the same value (for example, 10, 100, 1000).
nfltOffset	Value used to offset the final result of the output.
ufltFlag	The type of operation. These flags cannot be or-ed together.
	Value	Meaning
	UD_SUM	[0x0000] Perform sum operation.
	UD_MAX	[0x0001] Perform maximum operation.
	UD_MIN	[0x0002] Perform minimum operation.
ufltMatrix	Array of (ufltWidth * ufltHeight) integers containing the user-defined matrix (mask). The elements are stored in row order (first row, second row, etc).