How to make datagridview Headers FONT BOLD?

You asked the same question yesterday! I answered the question yesterday;

Set the ColumnHeadersDefaultCellStyle property for the datagridview.

What part do you not understand, did you even look at the documentation for DataGridView, or ColumnHeadersDefaultCellStlye?

You can set this property via the IDE at design time, or can apply the styling via code at run time. The ColumnHeadersDefaultCellStyle uses a DataGridViewStyle object, of which it has a Font property, which itself has a Bold property which can have the FontStyle.Bold applied.

in vb.net

Dim dc As DataGridViewColumn = DataGridView1.Columns(i)
              dc.HeaderCell.Style.BackColor = Color.FromArgb(196, 196, 196)

              dc.HeaderCell.Style.ForeColor = Color.FromArgb(0, 0, 0)
              dc.HeaderCell.Style.Font = New Font("Arial", 12,FontStyle.Bold )

I haved try that but it failed, then i try disable the "visualSyles of header property"

With DataGridview
.EnableHeadersVisualStyles = False
.Font = New Font(dataGridView.Font, FontStyle.Bold)
end with

and it's success
hope this can help you
thanks