C # uses WIN32API to get printers

The main use of the EnumPrinters function in Winspool.drv, the code is as follows:

[DllImport ("winspool.drv", SetLastError = true, CharSet = CharSet.Auto)]

[Return:marshalas (Unmanagedtype.bool)]

private static extern bool EnumPrinters ([MarshalAs (UNMANAGEDTYPE.U4)] Printer_enum flags,

[MarshalAs (UNMANAGEDTYPE.LPSTR)] string sname,

UINT Ilevel,

IntPtr Pprinterdesc,

UINT Isize,

[MarshalAs (UNMANAGEDTYPE.U4)] ref UINT ineeded,

[MarshalAs (UNMANAGEDTYPE.U4)] ref UINT ireturned

);

Description: The Marshal property provides marshaling of data to managed and unmanaged code.

The EnumPrinters WIN32 API is defined as follows:

BOOL EnumPrinters (

DWORD Flags,//Printer object types

LPTSTR name,//Name of printer object

DWORD level,//information level

Lpbyte Pprinterenum,//printer information buffer

DWORD cbbuf,//size of printer information buffer

Lpdword pcbneeded,//bytes received or required

Lpdword pcreturned//Number of printers enumerated

);