【Delphi】偵測電腦是否有安裝 Excel

 
uses
    ActiveX, comObj, ...;


procedure TForm1.Button1Click(Sender: TObject);
var
    ClassID: TCLSID;
begin
    // 檢查電腦是否有安裝 Excel
    if not Succeeded(CLSIDFromProgID(PWideChar(WideString('Excel.Application')),ClassID)) then
    begin
        ShowMessage('請檢查電腦是否有安裝 Excel');
    end;
end;