private static void SendSetGroupInfo(LVGROUP group, ListViewGroup lstvwgrp)
{
int?grpId = GetGroupID(lstvwgrp);
int gIndex = lstvwgrp.ListView.Groups.IndexOf(lstvwgrp);
IntPtr groupPtr = IntPtr.Zero;
try
{
groupPtr = Marshal.AllocHGlobal(group.CbSize + 1);
Marshal.StructureToPtr(group, groupPtr, false);
if (grpId != null)
{
group.IGroupId = grpId.Value;
WIN32.SendMessage(lstvwgrp.ListView.Handle, LVM_SETGROUPINFO, grpId.Value, groupPtr);
}
else
{
group.IGroupId = gIndex;
WIN32.SendMessage(lstvwgrp.ListView.Handle, LVM_SETGROUPINFO, gIndex, groupPtr);
}
}
catch (Exception err)
{
Debug.WriteLine("SendSetGroupInfo: " + err.Message);
}
finally
{
if (groupPtr != IntPtr.Zero)
{
Marshal.FreeHGlobal(groupPtr);
}
}
}
private static bool PrepareSendHeader(ListViewGroup lstvwgrp, out LVGROUP group)
{
group = new LVGROUP();
if (Environment.OSVersion.Version.Major < 6) //Only Vista and forward allows footer on ListViewGroups
{
return(false);
}
if (lstvwgrp == null || lstvwgrp.ListView == null)
{
return(false);
}
group.CbSize = Marshal.SizeOf(group);
return(true);
}