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<TD class="tt2" bgcolor="#F5F8F8" width="84%"><center><B><FONT style="FONT-SIZE: 16.5pt" COLOR="#FF6666" FACE="楷体_GB2312">检查驱动器是否就绪</FONT></B></center>
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<p class="tt2">　下面这个函数可以显示是否就绪。<br> 
<br> 
function DiskInDrive(Drive: Char): Boolean;<br> 
var ErrorMode: word;<br> 
begin<br> 
{ make it upper case } <br> 
if Drive in ['a'..'z'] then Dec(Drive, $20);<br> 
{ make sure it's a letter }<br> 
if not (Drive in ['A'..'Z']) then<br> 
raise EConvertError.Create('Not a valid drive ID');<br> 
{ turn off critical errors }<br> 
ErrorMode := SetErrorMode(SEM_FailCriticalErrors);<br> 
try<br> 
{ drive 1 = a, 2 = b, 3 = c, etc. }<br> 
if DiskSize(Ord(Drive) - $40) = -1 then<br> 
Result := False<br> 
else<br> 
Result := True;<br> 
finally<br> 
{ restore old error mode }<br> 
SetErrorMode(ErrorMode);<br> 
end;<br> 
end; </p> 
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