const uint TBM_GETPOS = 0x0400;
const uint TBM_SETPOS = 0x0405;
const int intCID = 10102;
public static void control_sopcast(IntPtr handle, int val_volume)
{
IntPtr pControl;
IntPtr cControl;
pControl = FindWindowEx(handle, IntPtr.Zero, "#32770", null);
cControl = GetDlgItem(pControl, intCID);
SendMessage(cControl, TBM_SETPOS, 1, val_volume);
SendMessage(pControl, WM_HSCROLL, 5, (int)cControl);
}
Can someone help me with this? Thanks.