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Visual Basic	C/C++	Description
Boolean	VARIANT_BOOL	Has the value True (-1) or False (0).
Byte Array	SAFEARRAY(unsigned char)	An array of bytes.
Color	OLE_COLOR	A color. In many containers, colors are treated as 32-bit integers. Refer to Color for more information.
DATE
Double	double	64-bit floating point number.
Double Array	LPSAFEARRAY	An array of doubles.
Float	float	32-bit floating point number.
Font	LPFONTDISP	An OLE Automation Interface to a font. Refer to Font for more information.
Integer	short	16-bit signed integer.
IPicture
long	long	32-bit signed integer.
Long	OLE_XPOS_PIXELS	Position on the X-axis in pixels.
Long	OLE_YPOS_PIXELS	Position on the Y-axis in pixels.
Long	LCID	A locale identifier.
LPUNKNOWN	LPUNKNOWN	A generic OLE interface.
LPUNKNOWN	IUnknown*	A generic OLE interface.
Object	IDispatch	A generic OLE Automation interface.
Object	LPDISPATCH	A generic OLE Automation Interface.
Object Array	SAFEARRAY	An array of objects.
OLE_COLOR
Picture	LPPICTUREDISP	An OLE Automation Interface to a picture or image. Refer to Picture for more information.
String	LPSTR	A string.
String	BSTR	A string.
String Array	SAFEARRAY(BSTR)	An array of strings.
Variant	LPVARIANT	A variant.
VARTYPE		An enumeration type used to describe a data type of a VARIANT or safearray value. Refer to VARENUM for more information.
Void	void	Nothing.
Window	OLE_HANDLE	A handle to a window.