小王编写了一个VB程序，功能为：在文本框Text1中输入三位自然数，单击“交换”按钮Command1，在文本框Text2中输出由该三位数各位数字重组后的最小数，运行界面如图所示。

（1）若要将按钮上显示的“Command1”改为“交换”，应设置Command1的________________属性。（2）小王编写的按钮事件过程代码如下：
Dim n As Integer, max As Integer
Dim a As Integer, b As Integer, c As Integer
Dim t As Integer，m As Iinteger
x = Val(Text1.Text)
a =" x" \ 100
b = ________①_______________
c =" x" Mod 10
If a >b Then t =" a:" a =" b:" b = t
If a > c Then t =" a:" a =" c:" c = t
If b > c Then t =" c:" c =" b:" b = t
___________②________________
Text2.Text = str(m)
为了实现上述功能，在程序划线处填入合适的代码。[:Zxxk.Com]
①划线处代码：_____________________________________。
②划线处代码：_____________________________________。