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嘿嘿,大侠看到不要见笑呀... 大家都知道使用DLL的好处.于是我就想把FORM封装到DLL里面去. 到网上找,发现是MDI和模式窗体的,非模式的也有...

于 2022-01-31 发布文件大小:63.31 kB

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嘿嘿,大侠看到不要见笑呀... 大家都知道使用DLL的好处.于是我就想把FORM封装到DLL里面去. 到网上找,发现是MDI和模式窗体的,非模式的也有很多问题.便想自己解决这个问题. 原来是用DLL创建一个对象返回,但发现有很多的问题. 想了半天就去寻根问柳吧. 找到了类. 我就想把类封装进DLL,到时简单的返回一个类,然后在主程序里操作不就简单了? 找了半天发现了TFormClass,于是试了试从DLL导出来,像一般的程序一样创建窗体发现成功. 接着我又想看看其他的类是不是也能这样,就拿TFrame来实验. function GetDllFrameClass():TFrame stdcall 第一次是这样声明的,失败.奇怪?! 试了好多次都不行,就想到了TFormClass(Ctrl+左键),进去看看,发现是这样声明的. TFormClass = class of TForm 哎呀,恍然大悟!! class(TFrame) 是声明一个类, 这个类继承了TFrame类 f: TFrame 是一个对象 class of TFrame 声明的是类类型, f:TFrameClass 是一个类. function GetDllFrameClass():TFrame 返回就不是类而是对象了,照TFormClass修改后TFrameClass = class of TFrame 运行...成功,

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