怎么接收不到信息呢？

[myshasha]

点击对话框的发送按钮，发送一个信息，怎么就接收不到呢？

#define WM_SENDBATCH		WM_USER + 23
class CUSBLabDlg : public CDialog
{
....
}
void CUSBLabDlg::OnButtonSend() //按钮事件
{
	// TODO: Add your control notification handler code here
	UpdateData(true);
	if(!m_EditMsg.IsEmpty())
	{
		WPARAM wParam;
		wParam = (WPARAM)(m_EditMsg.GetBuffer(m_EditMsg.GetLength()));
		m_EditMsg.ReleaseBuffer();
		SendMessage(WM_SENDBATCH, wParam, m_EditMsg.GetLength());//发送信息
		m_EditMsg = "";
		UpdateData(false);
	}
}

class CMainFrame : public CFrameWnd
{
......
protected:
afx_msg void OnSendBatch(WPARAM wParam, LPARAM lParam);
}

BEGIN_MESSAGE_MAP(CMainFrame, CFrameWnd)
//{{AFX_MSG_MAP(CMainFrame)
ON_MESSAGE(WM_SENDBATCH, OnSendBatch)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

void OnSendBatch(WPARAM wParam, LPARAM lParam)
{
   AfxMessageBox("Hello");
}

[一条晚起的虫]

编译通过了？
没看到OnSendBatch的声明。

[孤客天涯]

SendMessage(WM_SENDBATCH, wParam, m_EditMsg.GetLength());//发送信息
你是发给CUSBLabDlg类的主窗口，不是给CMainFrame 窗口
改成::SendMessage(AfxGetMainWnd()->GetSafeHwnd(),WM_SENDBATCH, wParam, m_EditMsg.GetLength());//发送信息

[myshasha]

改成 SendMessage(AfxGetMainWnd()->GetSafeHwnd(),WM_SENDBATCH, wParam, m_EditMsg.GetLength());这个后编译就出错了，
error C2660: 'SendMessageA' : function does not take 4 parameters

[myshasha]

啊，前面加上::就可以了。。。。