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procedure EnumComPorts(Ports: TStrings);
var
KeyHandle: HKEY;
ErrCode, Index: Integer;
ValueName, Data: string;
ValueLen, DataLen, ValueType: DWORD;
TmpPorts: TStringList;
begin
ErrCode := RegOpenKeyEx(HKEY_LOCAL_MACHINE, 'HARDWARE\DEVICEMAP\SERIALCOMM', 0,
KEY_READ, KeyHandle);
if ErrCode <> ERROR_SUCCESS then
raise ERegError.Create('打开串口列表的注册表项出错');
TmpPorts := TStringList.Create;
try
Index := 0;
repeat
ValueLen := 256;
DataLen := 256;
SetLength(ValueName, ValueLen);
SetLength(Data, DataLen);
ErrCode := RegEnumValue(KeyHandle, Index, PChar(ValueName),
Cardinal(ValueLen), nil, @ValueType, PByte(PChar(Data)), @DataLen);
if ErrCode = ERROR_SUCCESS then
begin
SetLength(Data, DataLen);
TmpPorts.Add(Data);
Inc(Index);
end
else if ErrCode <> ERROR_NO_MORE_ITEMS then
raise ERegError.Create('打开串口列表的注册表项出错');
until (ErrCode <> ERROR_SUCCESS);
TmpPorts.Sort;
Ports.Assign(TmpPorts);
finally
RegCloseKey(KeyHandle);
TmpPorts.Free;
end;
end;
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