C#pictureBox的mousemove事件

private void pictureBox2_MouseClick(object sender, MouseEventArgs e)
{
m_bOperatorLog = false;
m_bUser = false;
m_OpenDoor = false;
m_FiDoor = false;
Point pt = e.Location;

TreeNode node = dlgSearchTree.treeSearch.GetNodeAt(pt);
if(node == null)
{
return;
}
if (node != null)
{
dlgSearchTree.treeSearch.SelectedNode = node;
}
if (node.Text == "开门记录查询")
{
LoadOpenDoorRecord(1);
}
else if (node.Text == "识别记录查询")
{
LoadFiRecord(1);
}
else if (node.Text == "操作记录查询")
{
LoadOperateLogReport(1);
}
else if (node.Text == "员工查询")
{
LoadUser(1);
}
}

进入程序，点击界面，mousemove事件有时候不触发，在这里下断点，有时候不进这个事件，这是为什么？

[解决办法]
哪有你那个MouseMove事件，你这不是MouseClick吗