Question

我想设计一个文本框，其中每行的索引都在一个单独的列表框旁边。所有内容几乎完成但滚动仍然是我的问题。当我使用WndProc来控制滚动时，{ {1}}效果非常好并且同时使两个控件滚动，但是当我想通过列表框发送WM_VSCROLL时，它不起作用。我想我可以使用技巧并迭代{ {1}}当用户移动鼠标滚轮但它也不起作用时。

WM_MOUSEWHEEL

WM_VSCROLL是我的列表框的名称，private const int WM_VSCROLL = 0x115; private const int WM_MOUSEWHEEL = 0x20A; protected override void WndProc(ref Message m) { base.WndProc(ref m); if (m.Msg == WM_VSCROLL ) { Message newMessage = Message.Create(Sequence.Handle, m.Msg, m.WParam, m.LParam); Sequence.DirectMessage(newMessage);//turn to thread } else if(m.Msg == WM_MOUSEWHEEL) { if((int)m.WParam<0) { Message newMessage = Message.Create(Sequence.Handle, WM_VSCROLL,(IntPtr)1,(IntPtr) 0); Message newMessage2 = Message.Create(this.Handle, WM_VSCROLL, (IntPtr)1, (IntPtr)0); Sequence.DirectMessage(newMessage); base.WndProc(ref newMessage2); } else { Message newMessage = Message.Create(Sequence.Handle, WM_VSCROLL, (IntPtr)0, (IntPtr)0); Message newMessage2 = Message.Create(this.Handle, WM_VSCROLL, (IntPtr)0, (IntPtr)0); Sequence.DirectMessage(newMessage); base.WndProc(ref newMessage2); } } }是我文本框的推荐。我会很感激任何帮助....

Answer 1

与WM_SCROLL：

相同

[DllImport("user32.dll", EntryPoint = "SendMessage")]
internal static extern IntPtr SendMessage(IntPtr hWnd, UInt32 msg, IntPtr wParam, IntPtr lParam);

private const int WM_VSCROLL = 0x115;
private const int WM_MOUSEWHEEL = 0x20A;

protected override void WndProc(ref Message m)
{
    if (m.Msg == WM_VSCROLL || m.Msg == WM_MOUSEWHEEL)
    {
        SendMessage(Sequence.Handle, (UInt32)m.Msg, m.WParam, m.LParam);
    }

    base.WndProc(ref m);
}

如何同步文本框和列表框的滚动

1 个答案: