error C2660: 'Open' : function does not take 12 parameters

VC操作Word2003时，Open函数需要十六个参数：
Open(
vFileName, // FileName
vTrue, // Confirm Conversion.
vFalse, // ReadOnly.
vFalse, // AddToRecentFiles.
vOptional, // PasswordDocument.
vOptional, // PasswordTemplate.
vOptional, // Revert.
vOptional, // WritePasswordDocument.
vOptional, // WritePasswordTemplate.
vOptional, // Format. // Last argument for Word 97
vOptional, // Encoding // New for Word 2000/2002
vOptional, // OpenAndRepair
vZ, // DocumentDirection wdDocumentDirection LeftToRight
vOptional, // NoEncodingDialog
vOptional,
vOptional
)

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