VARIANTVT function

The VARIANTVT function returns the internal VT data type stored in the Variant. The entire range of %VT_ prefixed values are documented by the OLE (COM) specification and are available in WIN32API.INC.

The most important values in this limited context include %VT_EMPTY (=0) and %VT_BSTR (=8), since most of the others are numeric formats automatically resolved by the LET (with Variants) statement and VARIANT# function.

Result	Equate	Content Type
0	%VT_EMPTY	0 or Empty string
1	%VT_NULL	Null string
2	%VT_I2	Integer
3	%VT_I4	Long-Integer
4	%VT_R4	Single
5	%VT_R8	Double
6	%VT_CY	Currency
7	%VT_DATE	Date
8	%VT_BSTR	Dynamic String
9	%VT_DISPATCH	IDispatch
10	%VT_ERROR	Error Code
11	%VT_BOOL	Boolean
12	%VT_VARIANT	Variant
13	%VT_UNKNOWN	IUnknown
16	%VT_I1	Byte
17	%VT_UI1	Byte
18	%VT_UI2	Word
19	%VT_UI4	DWORD
20	%VT_I8	Quad (signed)
21	%VT_UI8	Quad (unsigned)
22	%VT_INT	Integer
23	%VT_UNIT	Word
24	%VT_VOID
25	%VT_HRESULT	COM result code
26	%VT_PTR	Pointer
27	%VT_SAFEARRAY	VB Array
28	%VT_CARRAY
29	%VT_USERDEFINED
30	%VT_LPSTR	ANSI string
31	%VT_LPWSTR	Unicode string
64	%VT_FILETIME
65	%VT_BLOB
66	%VT_STREAM
67	%VT_STORAGE
68	%VT_STREAMED_OBJECT
69	%VT_STORED_OBJECT
70	%VT_BLOB_OBJECT
71	%VT_CF
72	%VT_CLSID	Class ID
&H1000	%VT_VECTOR
&H2000	%VT_ARRAY	Array
&H4000	%VT_BYREF

If a Variant contains a complete array, the Variant type is determined by adding the base type to the array modifier. That is, for a string array, it would be %VT_BSTR plus %VT_ARRAY (= &H2008).

Quad arrays within Variants are not supported by most versions of Windows. The result from VARIANTVT can be used to see whether such an array was created properly.

VARIANTVT function

Result

Equate

Content Type