窗口按钮代码：

Dim Count As Integer = DataTables("SFMX").Compute("Count(ZT)","ZT = 0")
Dim Result As DialogResult
Result = MessageBox.Show("存在未收费的单据,是否继续收费?", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Question)
If Count > 0 Then
    If Result = DialogResult.Yes Then
        Tables("SFMX").Filter = "[ZT] = 0"
        Forms("找零计算").Show()
    Else
        e.Form.Controls("ComboBox1").value = Nothing
        e.form.Controls("ComboBox1").Select()
    End If
End If

问题：表中已经不存在未收费的单据Count > 0，提示框依然打开。

预想效果：

1、表中存在未收费单据时，打开提示框；

    点击“是”时，筛选出未收费单据，同时打开Forms("找零计算")窗口。

    点击“否”时，执行代码： e.Form.Controls("ComboBox1").value = Nothing
                                       e.form.Controls("ComboBox1").Select()
2、表中不存在未收费单据时Count <= 0，不打开提示框，直接执行代码：

    e.Form.Controls("ComboBox1").value = Nothing
    e.form.Controls("ComboBox1").Select()

谢谢！blackzhu，在易表论坛似曾相识，在这里有见面了。

Dim Count As Integer = DataTables("SFMX").Compute("Count(ZT)","ZT = 0")
If Count > 0 Then
    Dim Result As DialogResult
    Result = MessageBox.Show("存在未收费的单据,是否继续收费?", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Question)
    If Result = DialogResult.Yes Then
        Tables("SFMX").Filter = "[ZT] = 0"
        Forms("找零计算").Show()
    Else
        Tables("SFMX").Filter = "[BH] Is Null"
        e.Form.Controls("ComboBox1").value = Nothing
        e.Form.Controls("ComboBox2").value = Nothing
        e.Form.Controls("ComboBox3").value = Nothing
        e.Form.Controls("NumericComboBox1").value = Nothing
        e.Form.Controls("NumericComboBox2").value = Nothing
        e.form.Controls("ComboBox1").Select()
    End If
End If
If Count <= 0 Then
    Tables("SFMX").Filter = "[BH] Is Null"
    e.Form.Controls("ComboBox1").value = Nothing
    e.Form.Controls("ComboBox2").value = Nothing
    e.Form.Controls("ComboBox3").value = Nothing
    e.Form.Controls("NumericComboBox1").value = Nothing
    e.Form.Controls("NumericComboBox2").value = Nothing
    e.form.Controls("ComboBox1").Select()
End If

请大虾们看看上面代码能不能合并或简化。红色的两段有些啰嗦。