Simulate DoubleClick

Question

How can I programatically throw a doubleclick to select a row in a datagrid. I am able to trap the enter key now I would like to have it throw the double click event. Thanks John

jrosa · Answer

I found my solution. The trick is a to send a WM_LBUTTONDOWN then WM_LBUTTONUP then WM_LBUTTONDBLCLK then WM_LBUTTONUP. This triggers the controls double click event. Here is the code that works for me: public const int WM_LBUTTONDOWN = 513; // 0x0201 public const int WM_LBUTTONUP = 514; // 0x0202 public const int WM_LBUTTONDBLCLK = 515; //0x0203 [System.Runtime.InteropServices.DllImport(user32.dll)] static extern bool SendMessage(IntPtr hWnd Int32 msg Int32 wParam Int32 lParam); static int MakeLong(int LoWord int HiWord) { return (HiWord << 16) | (LoWord & 0xffff); } protected override bool ProcessCmdKey(ref System.Windows.Forms.Message msg System.Windows.Forms.Keys keyData) { if(msg.WParam.ToInt32() == (int) Keys.Enter) { System.Windows.Forms.MouseEventArgs e; int row = this.CurrentRowIndex; //get a point to click Rectangle rect = this.GetCellBounds(row 0); Int32 lparam = MakeLong(rect.Left - 4 rect.Top + 4); //double click it SendMessage( this.Handle WM_LBUTTONDOWN 0 lparam); SendMessage( this.Handle WM_LBUTTONUP 0 lparam); SendMessage( this.Handle WM_LBUTTONDBLCLK 0 lparam); SendMessage( this.Handle WM_LBUTTONUP 0 lparam); return false; } return base.ProcessCmdKey(ref msg keyData); } I hope this helps someone else. Regards John