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Datatypes
It is often difficult to map the SDK documentation syntax of the function call parameters with VB datatypes. Here is a table of common Win32 API datatypes and corresponding VB datatypes.
Win32 type
VB type
int, INT
ByVal Long
UINT
ByVal Long
BOOL
ByVal Long
WORD
ByVal Integer
DWORD
ByVal Long
WPARAM
ByVal Long
LPARAM, LRESULT
ByVal Long
COLORREF
ByVal Long
ATOM
ByVal Integer
HANDLE
ByVal Long
BYTE
ByVal Byte
char
ByVal Byte
LPINT, int *
ByRef Long
LPUINT, UINT *
ByRef Long
LPBOOL, BOOL *
ByRef Long
LPBYTE, BYTE *
ByRef Byte
LPWORD, WORD *
ByRef Integer
LPDWORD, DWORD *
ByRef Long
LPHANDLE, HANDLE *
ByRef Long
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