private static int MouseHookProc(int nCode, int wParam, IntPtr lParam)
{
if (nCode >= 0)
{
HookManager.MouseLLHookStruct structure = (HookManager.MouseLLHookStruct)Marshal.PtrToStructure(lParam, typeof(HookManager.MouseLLHookStruct));
MouseButtons buttons = MouseButtons.None;
short num = 0;
int clicks = 0;
bool flag1 = false;
bool flag2 = false;
switch (wParam)
{
case 513:
flag1 = true;
buttons = MouseButtons.Left;
clicks = 1;
break;
case 514:
flag2 = true;
buttons = MouseButtons.Left;
clicks = 1;
break;
case 515:
buttons = MouseButtons.Left;
clicks = 2;
break;
case 516:
flag1 = true;
buttons = MouseButtons.Right;
clicks = 1;
break;
case 517:
flag2 = true;
buttons = MouseButtons.Right;
clicks = 1;
break;
case 518:
buttons = MouseButtons.Right;
clicks = 2;
break;
case 522:
try
{
num = (short)(structure.MouseData >> 16 & (int)ushort.MaxValue);
break;
}
catch (Exception ex)
{
break;
}
}
MouseEventExtArgs e = new MouseEventExtArgs(buttons, clicks, structure.Point.X, structure.Point.Y, (int)num);
if (HookManager.s_MouseUp != null && flag2)
{
HookManager.s_MouseUp((object)null, (MouseEventArgs)e);
}
if (HookManager.s_MouseDown != null && flag1)
{
HookManager.s_MouseDown((object)null, (MouseEventArgs)e);
}
if (HookManager.s_MouseClick != null && clicks > 0)
{
HookManager.s_MouseClick((object)null, (MouseEventArgs)e);
}
if (HookManager.s_MouseClickExt != null && clicks > 0)
{
HookManager.s_MouseClickExt((object)null, e);
}
if (HookManager.s_MouseDoubleClick != null && clicks == 2)
{
HookManager.s_MouseDoubleClick((object)null, (MouseEventArgs)e);
}
if (HookManager.s_MouseWheel != null && num != (short)0)
{
HookManager.s_MouseWheel((object)null, (MouseEventArgs)e);
}
if ((HookManager.s_MouseMove != null || HookManager.s_MouseMoveExt != null) && (HookManager.m_OldX != structure.Point.X || HookManager.m_OldY != structure.Point.Y))
{
HookManager.m_OldX = structure.Point.X;
HookManager.m_OldY = structure.Point.Y;
if (HookManager.s_MouseMove != null)
{
HookManager.s_MouseMove((object)null, (MouseEventArgs)e);
}
if (HookManager.s_MouseMoveExt != null)
{
HookManager.s_MouseMoveExt((object)null, e);
}
}
if (e.Handled)
{
return(-1);
}
}
return(HookManager.CallNextHookEx(HookManager.s_MouseHookHandle, nCode, wParam, lParam));
}