WinForms + DevExpress中documentManager中的tites对象图片圆角

设置tite对象的下面属性即可实现圆角透明效果

this.utMyddc.Appearances.Normal.BackColor = System.Drawing.Color.Transparent;
this.utMyddc.Appearances.Normal.Options.UseBackColor = true;
this.utMyddc.Appearances.Pressed.BackColor = System.Drawing.Color.Transparent;
this.utMyddc.Appearances.Pressed.Options.UseBackColor = true;
this.utMyddc.Appearances.Selected.BackColor = System.Drawing.Color.Transparent;
this.utMyddc.Appearances.Selected.Options.UseBackColor = true;