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GetDiffStatus
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Returns the status of the diff operation.  
 
Syntax  
 
Sub GetDiffStatus(ByRef status as Integer)  
 
Remarks  
 
The function will return -1 if this function is called before the diff operation is performed.  
 
Status codes:  
   -1 - Not Ready
    0 - OK
    1 - Files are identical
    2 - Unknown
    3 - Same file defined for base and revised
    4 - Files not HTML
    5 - Could not prepare base file
    6 - Could not prepare modified file
    7 - Files contain different number of frames
    8 - Missing parameter
    9 - File not found