PInvoke, managed and unmanaged datatypes

I'm doing a lot of PInvoking lately. One of the hard parts is mapping the unmanaged datatypes found in c++ include files to managed datatypes.

I found a nice article on codeproject with a list of the most common mappings. I'll repeat the list here so I can find it easilly, maybe other people can benefit from it too. I'll keep the list up-to-date with my own mappings and some remarks.

Unmanaged	Managed	Remarks
BOOL, BOOLEAN	Boolean, Int32	A 32 bit field set to 0 for FALSE and 1 for TRUE
BSTR	String
BYTE	SByte	Signed byte, the original article has BYTE and UBYTE switched around.
CHAR	Char	CHAR is single byte ANSI character, Char is a dual byte Unicode character. Byte may be a better mapping.
DOUBLE	Double
DWORD	UInt32	The original article also said Int32, but DWORD is always unsigned
FLOAT	Single
GUID	Guid	GUID is actually a c struct consisting of different integer values. The framework marshalls this to a Guid value.
HANDLE	IntPtr	32 bits on x86, 64 bits on 64 bit platforms. Also used for other handles like HFONT and HMENU
HRESULT	Int32	The original artilcle also said UInt32 but HRESULT is defined as signed
INT	Int32
LANGID	Int16 or UInt16
LCID	Int32 or UInt32
LONG	Int32
LPARAM	IntPtr, UIntPtr or Object	Value can represent different things depending on context. 32 or 64 bits depending on platform.
LPCSTR, LPCTSTR, LPCWSTR	String
LPSTR, LPTSTR, LPWSTR	String	String is immutable so use StringBuilder instead of String if the string can change in unmanaged code
LPVOID	IntPtr, UIntPtr or Object
LRESULT	IntPtr	Value can represent different things depending on context. 32 or 64 bits depending on platform.
SAFEARRAY	.NET array type
SHORT	Int16
TCHAR	Char
UCHAR	Byte
UINT	UInt32
ULONG	UInt32
UUID	Guid	Not sure if this works. GUID and UUID datatype are about the same so it should.
VARIANT	Object
VARIANT_BOOL	Boolean
WCHAR	Char	16 bit Unicode character
WORD	UInt16	The original article also said Int32 but WORD is unsigned only.
WPARAM	IntPtr, UIntPtr or Object	Value can represent different things depending on context. 32 or 64 bits depending on platform.

Most of the unmanaged datatypes are defined in windef.h. Microsoft has a page on MSDN here with descriptions.