主题：[求助]日期输入控件问题

基本常识错误

dim frm as winform.form = e.form

Dim d1 As Date = frm.controls("DateTimePicker1").value
Dim d2 As Date = frm.controls("DateTimePicker2").value

Dim m As Integer = (d2.year - d1.year) * 12 + (d2.month - d1.month)
frm.controls("textbox9").text = m

建议先读三遍帮助文件，心急吃不得热豆腐