Platform call data type

The following table lists the data types used in Win32 APIs (listed in wtypes. h) and C style functions. Many non-writable libraries contain functions that pass these data types as parameters and return values. The third column lists the corresponding. NET Framework built-in value types or classes used in managed code. In some cases, you can replace the types listed in this table with the same size.

Description of unmanaged C-language managed classes in wtypes. h
Handle
Void *
System. intptr
32-bit windows and 64-bit windows.
 
Byte
Unsigned char
System. byte
8-digit
 
Short
Short
System. int16
16-bit
 
Word
Unsigned short
System. uint16
16-bit
 
Int
Int
System. int32
32-bit
 
Uint
Unsigned int
System. uint32
32-bit
 
Long
Long
System. int32
32-bit
 
Bool
Long
System. int32
32-bit
 
DWORD
Unsigned long
System. uint32
32-bit
 
Ulong
Unsigned long
System. uint32
32-bit
 
Char
Char
System. Char
It is modified with ANSI.
 
Lpstr
Char *
System. string or system. Text. stringbuilder
It is modified with ANSI.
 
Lpcstr
Const char *
System. string or system. Text. stringbuilder
It is modified with ANSI.
 
Lpwstr
Wchar_t *
System. string or system. Text. stringbuilder
Use Unicode.
 
Lpcwstr
Const wchar_t *
System. string or system. Text. stringbuilder
Use Unicode.
 
Float
Float
System. Single
32-bit
 
Double
Double
System. Double
64-bit
 

For the corresponding types in Visual Basic 2005, C #, and C ++, see. NET Framework class library introduction.
Long * --> ref int
Const char * --> string or stringbuilder
Double * --> ref double
Unsigned short * --> Ref system. uint16

Const char ** --> string [,]