private static extern IntPtr SendMessage(IntPtr hWnd, int Msg, IntPtr wParam, ref LVHITTESTINFO lParam);
public static int ListView_SubItemHitTest(IntPtr hwnd, ref LVHITTESTINFO pinfo)
{
return HitTest(hwnd, 0x1039, ref pinfo);
}
public static int ListView_SubItemHitTest(IntPtr hwnd, Point pt)
{
LVHITTESTINFO pinfo = new LVHITTESTINFO {
pt = pt
};
if (HitTest(hwnd, 0x1039, ref pinfo) < 0)
{
return -1;
}
return pinfo.iSubItem;
}
private static int HitTest(IntPtr hwnd, int msg, ref LVHITTESTINFO pinfo)
{
return (int) SendMessage(hwnd, msg, IntPtr.Zero, ref pinfo);
}
private bool HitTest(IntPtr ShellViewHandle, Point hitPoint, out int row, out int column)
{
// clear the output values
row = column = -1;
// set up some win32 api constant values
const int LVM_FIRST = 0x1000;
//const int LVM_SUBITEMHITTEST = (LVM_FIRST + 57);
const int LVM_HITTEST = (LVM_FIRST + 18);
const int LVHT_NOWHERE = 0x1;
const int LVHT_ONITEMICON = 0x2;
const int LVHT_ONITEMLABEL = 0x4;
const int LVHT_ONITEMSTATEICON = 0x8;
const int LVHT_EX_ONCONTENTS = 0x04000000;
const int LVHT_ONITEM = (LVHT_ONITEMICON | LVHT_ONITEMLABEL | LVHT_ONITEMSTATEICON | LVHT_EX_ONCONTENTS);
// set up the return value
bool hitLocationFound = false;
// initialise a hittest information structure
LVHITTESTINFO lvHitTestInfo = new LVHITTESTINFO();
lvHitTestInfo.pt.x = hitPoint.X;
lvHitTestInfo.pt.y = hitPoint.Y;
// send the hittest message to find out where the click was
if (SendMessage(ShellViewHandle, LVM_HITTEST, 0, ref lvHitTestInfo) != 0)
{
bool nowhere = ((lvHitTestInfo.flags & LVHT_NOWHERE) != 0);
bool onItem = ((lvHitTestInfo.flags & LVHT_ONITEM) != 0);
if (onItem && !nowhere)
{
row = lvHitTestInfo.iItem;
column = lvHitTestInfo.iSubItem;
hitLocationFound = true;
}
}
else if (SendMessage(ShellViewHandle, LVM_FIRST, 0, ref lvHitTestInfo) != 0)
{
row = 0;
hitLocationFound = true;
}
return hitLocationFound;
}
private static extern int SendMessage(IntPtr hWnd, int msg, int wParam, ref LVHITTESTINFO lParam);
