Gets or sets a value indicating whether the height of the column headers is adjustable and whether it can be adjusted by the user or is automatically adjusted to fit the contents of the headers.
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When this property is set to DataGridViewColumnHeadersHeightSizeMode.AutoSize, the height of the column headers cannot be adjusted by the user.
To adjust the height of the column headers programmatically, use the erload:System.Windows.Forms.DataGridView.AutoResizeColumnHeadersHeight method or set the DataGridView.ColumnHeadersHeight property.
To set the sizing mode for the row headers, use the DataGridView.RowHeadersWidthSizeMode property.
For cell contents to wrap onto multiple lines when the column headers are resized, the cell style in effect for the cell must have a DataGridViewCellStyle.WrapMode property value of DataGridViewTriState.True.
For more information about header sizing, see Sizing Options in the Windows Forms DataGridView Control.
The System.Windows.Forms.DataGridView control does not support double buffering. If Control.DoubleBuffered is set to true in a derived System.Windows.Forms.DataGridView control, users will not receive visual feedback when resizing rows, columns, or headers or when reordering columns.