How to change the width of the WinForms DateTimePicker (DateTimePickerAdv) when it is in the standard format?

//New font size is set here.
this.dateTimePickerAdv1.Font = new Font("Tahoma", 13);
this.dateTimePickerAdv1.ShowCheckBox = false;
this.dateTimePickerAdv1.ShowUpDown = true;
this.dateTimePickerAdv1.AutoSize = false;
this.dateTimePickerAdv1.AutoSizeMode = AutoSizeMode.GrowOnly;
this.dateTimePickerAdv1.Format = DateTimePickerFormat.Long;
int updownWidth = 0, dropWidth = 0;
 
//Calculating the UpDown and DropDown button width
foreach (Control ctrl in this.dateTimePickerAdv1.Controls)
{
    if (ctrl.GetType().ToString() == "Syncfusion.Windows.Forms.Tools.DateTimePickerUpDownButton")
        updownWidth = ctrl.Size.Width;
    else if (ctrl.GetType().ToString() == "Syncfusion.Windows.Forms.Tools.DateTimePickerDropButton")
        dropWidth = ctrl.Size.Width;
}
 
//Sum up the width of drop down button, updown button and font.
int nWidth = dropWidth + updownWidth + Convert.ToInt32(this.dateTimePickerAdv1.Font.Size * this.dateTimePickerAdv1.Value.ToLongDateString().Length);
this.dateTimePickerAdv1.Width = nWidth;

''Font is set
Me.DateTimePickerAdv2.Font = New Font("Tahoma", 13)
Me.DateTimePickerAdv2.ShowCheckBox = False
Me.DateTimePickerAdv2.ShowUpDown = True
Me.DateTimePickerAdv2.AutoSize = False
Me.DateTimePickerAdv2.AutoSizeMode = Windows.Forms.AutoSizeMode.GrowOnly
Me.DateTimePickerAdv2.Format = DateTimePickerFormat.Long
Dim updownWidth As Integer = 0, dropWidth As Integer = 0
 
''Calculating the UpDown and DropDown button width
For Each ctrl As Control In Me.DateTimePickerAdv2.Controls
   If ctrl.GetType().ToString() = "Syncfusion.Windows.Forms.Tools.DateTimePickerUpDownButton" Then
      updownWidth = ctrl.Size.Width
   ElseIf ctrl.GetType().ToString() = "Syncfusion.Windows.Forms.Tools.DateTimePickerDropButton" Then
      dropWidth = ctrl.Size.Width
   End If
Next ctrl
 
''Sum up the width of drop down button, updown button and font.
Dim nWidth As Integer = dropWidth + updownWidth + Convert.ToInt32(Me.DateTimePickerAdv2.Font.Size * Me.DateTimePickerAdv2.Value.ToLongDateString().Length)
Me.DateTimePickerAdv2.Width = nWidth