Как изменить размер заголовков колонок в ListView

Следующий код можно использовать в событии Form_Resize или прямо в Form_Load.

'Module: Module1
Option Explicit

Private Type RECT
    Left As Long
    Top As Long
    Right As Long
    Bottom As Long
End Type

Private Declare Function GetClientRect Lib “user32” 
(ByVal hWnd As Long, lpRect As RECT) As Long

Public Function GetClientWidth(hWnd As Long) As Long
Dim lpRect As RECT
Dim lReturn As Long
    lReturn = GetClientRect(hWnd, lpRect)
    GetClientWidth = lpRect.Right - lpRect.Left
End Function

Public Function ReSizeColumnHeaders
(ListView As MSComctlLib.ListView)
Dim HeadersWidth As Long
Dim ClientWidth As Long
Dim ColumnHeader As MSComctlLib.ColumnHeader
    For Each ColumnHeader In ListView.ColumnHeaders
        HeadersWidth = HeadersWidth + ColumnHeader.Width
    Next
    ClientWidth = GetClientWidth(ListView.hWnd) * 
Screen.TwipsPerPixelX
    For Each ColumnHeader In ListView.ColumnHeaders
        ColumnHeader.Width = 
(ClientWidth * ColumnHeader.Width) \ 
HeadersWidth
    Next
End Function


'Form: Form1
Private Sub Form_Resize()
On Error GoTo Form_Resize_Err
    Select Case WindowState
    Case vbNormal, vbMaximized
        ListView1.Move ScaleLeft, ScaleTop, ScaleWidth , 
ScaleHeight
        ReSizeColumnHeaders ListView1
    End Select

Form_Resize_Exit:
    Exit Sub

Form_Resize_Err:
    MsgBox Err.Description, vbCritical
    Resume Form_Resize_Exit

End Sub