C#

this.pcaTimePicker3.FormattingEnabled = true;
this.pcaTimePicker3.Items.AddRange(new object[] {
"12:00 ",
"12:30 ",
"1:00 ",
"1:30 ",
"2:00 ",
"2:30 ",
...});
this.pcaTimePicker3.Location = new System.Drawing.Point(101, 243);
this.pcaTimePicker3.Name = "pcaTimePicker3";
this.pcaTimePicker3.Size = new System.Drawing.Size(121, 21);
this.pcaTimePicker3.TabIndex = 5;

public Form1()
{
    InitializeComponent();
    MessageBox.Show(pcaTimePicker3.Items.Count.ToString());   // displays 96
    pcaTimePicker3.Items.Clear();                             // clear items the were added by designer
    pcaTimePicker3.Increment = 30;                            // inderect invoke of Repop...
    MessageBox.Show(pcaTimePicker3.Items.Count.ToString());   // displays correct value 48!
}

protected override void InitLayout()
{
    base.InitLayout();
    if (DesignMode) return;
    RepopulateChoices();
}

public partial class MyForm : Form
{
    const Int32 HTCAPTION = 0x2;
    const Int32 WM_NCLBUTTONDBLCLK = 0xA3;
 
    protected override void WndProc(ref Message msg)
    {
        switch (msg.Msg)
        {
           case WM_NCLBUTTONDBLCLK:
               if (msg.WParam.ToInt32() == HTCAPTION)
                   return;
               break;
        };
        base.WndProc(ref msg);
    }
}

jrahma wrote:

form ID like FRM123

static int? Convert (string value)
 {
     if (string.IsNullOrEmpty(value))
         return null;

     int returnedInt;
     if (int.TryParse(value, out returnedInt))
         return returnedInt;

     // I've asssumed that you want null if the value is unparsable
     // You might want to throw an argument exception instead here.
     return null;
 }

public int? ToNullableInt32(string s)
{
    int i;
    return (Int32.TryParse(s, out i)) ? i : null;
}

//........

String s ="";
int? nullint = ToNullableInt32(s);