獲取序列號是要讀取軟硬光碟的資訊，可通過以下函式獲得：
public declare function getvolumeinformation lib "kernel32.dll" alias "getvolumeinformationa" (byval lprootpathname as string, byval lpvolumenamebuffer as string, byval nvolumenamesize as integer, lpvolumeserialnumber as long, lpmaximumcomponentlength as long, lpfilesystemflags as long, byval lpfilesystemnamebuffer as string, byval nfilesystemnamesize as long) as long。
現在說明一下這個函式：
它用於獲取序列號，卷標，盤資訊（如：是否壓縮等）以下乙個例子：
先定以乙個呼叫它的自定義函式：
function getitnum(strdrv as string) as long
dim getnum as long
dim rs as long
dim temp1 as string
dim temp2 as string
temp1 = string$(255, chr$(0))
temp2 = string$(255, chr$(0))
rs = getvolumeinformation(strdrv, temp1, len(temp1), getnum, 0, 0, temp2, len(temp2))
msgbox "卷標為："+temp1
msgbox "序列號為："+hex(serialnum)
end function
以後使用時就呼叫getitnum（"碟符"）就可以了！
這樣就可以十分順利的來控制滑鼠了！
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