(fb as IUnknown).QueryInterface(IBah,f); //So why bother with this way at all??work since "f" holds reference to IBah, which doesn't have TestFoo1()
(fb as IUnknown).QueryInterface似乎在第一次调用QueryInterface时,即使我们给"f“变量分配了错误的
我在Delphi 7应用程序中有一个代码。当我在Delphi XE4中打开它时,然后当我比较SVN中的这两个代码时,我注意到所有的dfm文件都被更改了。我注意到的变化如下:Height = 277 --changed in Delphi XE4
ExplicitWidth = 443--added automatically in De