http://www.cnblogs.com/wuhuacong/archive/2009/07/09/1520082.html
左边的工具里怎么打开Form1窗口?
MainForm mp = new MainForm();
mp.ShowContent("Form1", this.GetType());
左边的工具里这样写为什么打不开Form1窗口?
ShowContent("Form1", f.GetType());
只能在主界面窗体打开Form1窗口
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MDIParent1 mp = new MDIParent1();
mp.ShowContent("Form1", typeof(Form1));
public partial class Form1 : BaseForm
这样也打不开