VC++2008 winform程序Color::FromArgb的问题

Question

在VC++2008中使用Windows应用程序建立窗体做程序的时候，其Color::FromArgb()老是创建不正确，代码如下：

      System::Int32^ k=System::Convert ::ToInt32( 0.299 * 222 + 0.587 *333 + 0.114 * 444);
      Color red = Color::FromArgb(k,k,k);

错误为error C2665: “System::Drawing::Color::FromArgb”: 4 个重载中没有一个可以转换所有参数类型
请问这个怎么解决呢？我着实没有搞懂这个问题的解决办法，谢谢！

Answer 1

Int32^和Int32是不同的，一个是值类型，一个是引用类型

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Answer 2

或者你可以直接这样做：

  Color red = Color::FromArgb( 255, 0, 0 );
   Color green = Color::FromArgb( 0, 255, 0 );
   Color blue = Color::FromArgb( 0, 0, 255 );

举例部分的整数你填写自己需要的。