鼠标滚轮事件

[qiebc2]

我想实现在对话框中当滚动鼠标中轮时屏幕滚动,但不响应OnMouseWheel消息,打断点也不进,谁知道怎么回事呀.

[闪破风浪]

贴代码Look～

[hurryboylqs]

要激活它
响应在对话框的WM_MOUSEACTIVATE消息
我这是WTL的，MFC差不多

int CXXXDlg::OnMouseActivate(CWindow wndTopLevel, UINT nHitTest, UINT message)
{

	// We handle this message so that when user clicks once in the
	// dialog, it will be given the focus, and this will allow
	// mousewheel messages to be directed to this window.
	SetFocus();

	return 1;

}

[yqlhust]

路过，学习~

[aaaa3105563]

学习

[qiebc2]

[Quote=引用 1 楼 LBPeking 的回复:]
贴代码Look～
[/Quote]

没有代码，只有消息函数打断点都不进。

[qiebc2]

[Quote=引用 2 楼 hurryboylqs 的回复:]
要激活它
响应在对话框的WM_MOUSEACTIVATE消息
我这是WTL的，MFC差不多

C/C++ code
int CXXXDlg::OnMouseActivate(CWindow wndTopLevel, UINT nHitTest, UINT message)
{

// We handle this message so that when user clicks once in the
// dialog, it will be given the focus, and this will allow
// mousewheel messages to be directed to this window.
SetFocus();

return 1;

}
[/Quote]

不行呀，还是不进断点。

[码侬]

重载虚函数 PreTranslateMessage(MSG* pMsg)

switch (pMsg->message)
{
// wheel
case WM_MOUSEWHEEL:
// 在此设断点
break;
}

[qiebc2]

PreTranslateMessage(MSG* pMsg)可以，但为什么在OnMouseWheel里就不行呢？

[biweilun]

onmousewheel 当鼠标滚轮按钮旋转时触发，

加上

#define   _WIN32_WINNT     0x0400

看看行不行

[hurryboylqs]

不会的，还没发现不行的说法，除非你那代码不恰当消息被其他吃掉
代码不大的话可以发我帮你看看[e-mail]

[neusoftlln]

Message Map中添加：
MESSAGE_HANDLER(WM_MOUSEACTIVATE, OnMouseActivate)