SHQueryRecycleBin - Retrieves the size of the Recycle Bin and the number of items in it, for a specified drive or folder.

example1.ahk

#include <SHQueryRecycleBin>
SHQueryRecycleBin("C:\", bytes, items)
MsgBox % "The recycle bin on drive C:\ contains " . items . " items (" . bytes . " bytes)."

SHQueryRecycleBin.ahk

/*
Function: SHQueryRecycleBin
Retrieves the size of the Recycle Bin and the number of items in it, for a specified drive.

Parameters:
	STR path - the path of the root drive on which the Recycle Bin is located. This parameter can contain a string formatted with the drive, folder, and subfolder names (C:\Windows\System...).
	[byRef] INT64 outSize - receives the total size of all the objects in the specified Recycle Bin, in bytes.
	[byRef] INT64 outNumber - receives the total number of items in the specified Recycle Bin.

Returns:
	BOOL success - true on success, false otherwise

Requirements:
	OS - Windows 2000 Professional, Windows XP / Windows 2000 Server or higher
	AutoHotkey - any AutoHotkey version (classic, _L, v2)
*/
SHQueryRecycleBin(path, ByRef outSize, ByRef outNumber)
{
	VarSetCapacity(SHQUERYRBINFO, 20, 0) ; create SHQUERYRBINFO structure
	, NumPut(20, SHQUERYRBINFO, 00, "UInt") ; fill cbSize member
	, hr := DllCall("Shell32\SHQueryRecycleBin" . (A_IsUnicode ? "W" : "A"), "Str", path, A_PtrSize ? "Ptr" : "UInt", &SHQUERYRBINFO, "Int") ; call function
	, outSize := NumGet(SHQUERYRBINFO, 4, "Int64") ; retrieve data (bytes)
	, outNumber := NumGet(SHQUERYRBINFO, 12, "Int64") ; retrieve item count
	return hr >= 0x00 ; return BOOL
}