myMultiColHeaderDgv
...................\MultiColHeaderDgvTest
...................\.....................\bin
...................\.....................\...\Debug
...................\.....................\...\.....\MultiColHeaderDgvTest.exe
...................\.....................\...\.....\myMultiColHeaderDgv.dll
...................\.....................\FrmTest.cs
...................\.....................\FrmTest.Designer.cs
...................\.....................\FrmTest.resx
...................\.....................\MultiColHeaderDgvTest.csproj
...................\.....................\Program.cs
...................\.....................\Properties
...................\.....................\..........\AssemblyInfo.cs
...................\.....................\..........\Resources.Designer.cs
...................\.....................\..........\Resources.resx
...................\.....................\..........\Settings.Designer.cs
...................\.....................\..........\Settings.settings
...................\myMultiColHeaderDgv
...................\...................\bin
...................\...................\...\Debug
...................\...................\...\.....\myMultiColHeaderDgv.dll
...................\...................\MultiColHeaderDgv.cs
...................\...................\myMultiColHeaderDgv.csproj
...................\...................\Properties
...................\...................\..........\AssemblyInfo.cs
...................\myMultiColHeaderDgv.sln