高手求救SendMessage问题

[xuedisheng]

SendMessage(button3.Handle, WM_LBUTTONDOWN, wParam, MAKELPARAM(40, 11));
SendMessage(button3.Handle, WM_LBUTTONUP, wParam, MAKELPARAM(40, 11));
这句是实现模拟鼠标点击效果，
如果句柄是按钮的句柄就能执行占击效果，
为什么把句柄改成窗体的名句柄就不能实现了
如果改成
SendMessage(Handle, WM_LBUTTONDOWN, wParam, MAKELPARAM(40, 11));
SendMessage(Handle, WM_LBUTTONUP, wParam, MAKELPARAM(40, 11));
就没有实现点击效果

[zhu4139365]

up

[s000rd]

什么问题，lz能否描述的清楚一点,button3和窗体有什么关系

[yanlongwuhui]

[Quote=引用楼主 xuedisheng 的帖子:]
如果句柄是按钮的句柄就能执行占击效果，
为什么把句柄改成窗体的名句柄就不能实现了
[/Quote]
句柄是窗体的话点击的应该就是窗体了吧。你的代码贴的不全

[flyjimi]

窗体和按钮都可以点击到啊。

public partial class FormApi : Form
    {
        public const uint WM_LBUTTONDOWN   = 0x0201;
        public const uint WM_LBUTTONUP = 0x0202;

        [DllImport("user32.dll", EntryPoint = "SendMessageA")]
        public static extern int SendMessage(IntPtr hwnd, uint wMsg, long wParam, long lParam);
        int MAKELPARAM(ushort wLow, ushort wHigh)
        {
            return wHigh * 0x10000 + wLow;
        }
        public FormApi()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            SendMessage(this.Handle, WM_LBUTTONDOWN, 0, MAKELPARAM(40, 11));
            SendMessage(this.Handle, WM_LBUTTONUP, 0, MAKELPARAM(40, 11));
        }

        private void button2_Click(object sender, EventArgs e)
        {
            MessageBox.Show("button2_Click");
        }

        private void FormApi_Click(object sender, EventArgs e)
        {
            MessageBox.Show("FormApi_Click");
        }
    }

[killer_liqiao]

up