表示/非表示
[列の表示/非表示]
xlRange = (Range^)ws->Columns["A:A", System::Type::Missing];
xlRange->Hidden=false;  // true:非表示/false:表示
System::Runtime::InteropServices::Marshal::ReleaseComObject(xlRange);


[行の表示/非表示]
xlRange = (Range^)ws->Row["1:1", System::Type::Missing];
xlRange->Hidden=false;  // true:非表示/false:表示
System::Runtime::InteropServices::Marshal::ReleaseComObject(xlRange);