winform不获取焦点的右下角提示窗体

[{"title":"（ 28 个子文件 69KB ） winform不获取焦点的右下角提示窗体","children":[{"title":"MessageForm","children":[{"title":"MessageForm.suo <span style='color:#111;'> 17.00KB </span>","children":null,"spread":false},{"title":"MessageForm","children":[{"title":"bin","children":[{"title":"Debug","children":[{"title":"MessageForm.vshost.exe <span style='color:#111;'> 5.50KB </span>","children":null,"spread":false},{"title":"MessageForm.pdb <span style='color:#111;'> 31.50KB </span>","children":null,"spread":false},{"title":"MessageForm.exe <span style='color:#111;'> 40.00KB </span>","children":null,"spread":false}],"spread":true}],"spread":true},{"title":"Form1.Designer.cs <span style='color:#111;'> 2.59KB </span>","children":null,"spread":false},{"title":"frm_message.resx <span style='color:#111;'> 5.87KB </span>","children":null,"spread":false},{"title":"Program.cs <span style='color:#111;'> 470B </span>","children":null,"spread":false},{"title":"obj","children":[{"title":"MessageForm.csproj.FileList.txt <span style='color:#111;'> 341B </span>","children":null,"spread":false},{"title":"Debug","children":[{"title":"MessageForm.frm_message.resources <span style='color:#111;'> 180B </span>","children":null,"spread":false},{"title":"MessageForm.Properties.Resources.resources <span style='color:#111;'> 18.07KB </span>","children":null,"spread":false},{"title":"MessageForm.Form1.resources <span style='color:#111;'> 180B </span>","children":null,"spread":false},{"title":"TempPE","children":[{"title":"Properties.Resources.Designer.cs.dll <span style='color:#111;'> 4.50KB </span>","children":null,"spread":false}],"spread":true},{"title":"MessageForm.pdb <span style='color:#111;'> 31.50KB </span>","children":null,"spread":false},{"title":"Refactor","children":null,"spread":false},{"title":"MessageForm.exe <span style='color:#111;'> 40.00KB </span>","children":null,"spread":false},{"title":"MessageForm.csproj.GenerateResource.Cache <span style='color:#111;'> 943B </span>","children":null,"spread":false}],"spread":true},{"title":"MessageForm.csproj.FileListAbsolute.txt <span style='color:#111;'> 737B </span>","children":null,"spread":false}],"spread":true},{"title":"MessageForm.csproj <span style='color:#111;'> 3.62KB </span>","children":null,"spread":false},{"title":"Resources","children":[{"title":"MSG.jpg <span style='color:#111;'> 17.57KB </span>","children":null,"spread":false}],"spread":true},{"title":"frm_message.cs <span style='color:#111;'> 4.67KB </span>","children":null,"spread":false},{"title":"Form1.cs <span style='color:#111;'> 671B </span>","children":null,"spread":false},{"title":"Form1.resx <span style='color:#111;'> 5.68KB </span>","children":null,"spread":false},{"title":"frm_message.designer.cs <span style='color:#111;'> 4.24KB </span>","children":null,"spread":false},{"title":"Properties","children":[{"title":"Resources.resx <span style='color:#111;'> 6.05KB </span>","children":null,"spread":false},{"title":"Settings.settings <span style='color:#111;'> 249B </span>","children":null,"spread":false},{"title":"AssemblyInfo.cs <span style='color:#111;'> 1.21KB </span>","children":null,"spread":false},{"title":"Settings.Designer.cs <span style='color:#111;'> 1.07KB </span>","children":null,"spread":false},{"title":"Resources.Designer.cs <span style='color:#111;'> 3.02KB </span>","children":null,"spread":false}],"spread":false}],"spread":false},{"title":"MessageForm.sln <span style='color:#111;'> 922B </span>","children":null,"spread":false}],"spread":true}],"spread":true}]