region and endregion pragma
#pragma region lets you specify a block of code that you can expand or collapse when using the outlining feature of the Visual Studio editor.
Syntax
#pragma regionname
#pragma endregioncomment
Parameters
comment
(Optional) A comment to display in the code editor.
name
(Optional) The name of the region. This name displays in the code editor.
Remarks
#pragma endregion marks the end of a #pragma region block.
A #pragma region block must be terminated by a #pragma endregion directive.
Example
// pragma_directives_region.cpp
#pragma region Region_1
void Test() {}
void Test2() {}
void Test3() {}
#pragma endregion Region_1
int main() {}