如何在 C++ Builder 中使用 PowerPoint 自动化?

How to use PowerPoint Automation in C++ Builder?

当我尝试使用变体自动化打开 PowerPoint 文件 (ppt) 时收到此错误消息:

Unknown Name

我试过使用自动化:

// Open PPT File
void TMainForm::OpenPPTFile(UnicodeString APPTFile)
{

    UnicodeString ppt_path = ExtractFilePath(Application->ExeName)+"ppt\";
    UnicodeString ppt_filename = ppt_path+APPTFile;
    Variant PowerPoint;

    if ( !DirectoryExists(ppt_path) )
    {
        Application->MessageBoxW(L"The specified Directory does't exist!", L"Error", MB_OK);
        return;
    }

    if ( !FileExists(ppt_filename) )
    {
        Application->MessageBoxW(L"The specified File does't exist!", L"Error", MB_OK);
        return;
    }

    PowerPoint = CreateOleObject("PowerPoint.Application");

    if ( PowerPoint.IsEmpty() )
    {
        Application->MessageBoxW(L"Unable to open Powerpoint, please check if installed!", L"Error", MB_OK);
        return;
    }

    PowerPoint.OlePropertySet("Enabled", true);
    PowerPoint.OlePropertySet("Visible", true);
    PowerPoint.OlePropertyGet("Presentations").OleProcedure("Open", ppt_filename, false, false, true);

}

这段代码给出了上面的错误。 注意:PowerPoint 在后台打开没有任何错误,但 ppt 没有。

当您引用的 属性、函数或方法不存在时,会出现此错误。 Application对象没有Enabled属性MSDN. To open ppt you should use WideString type for ppt_filename because this type is compatible with BSTR type used with COM objects or you should use StringToOleStr().