说明：  本VB6程序主要适用于初学者。 通过输入三个数字，来表示一个三角形的三条边。 然后通过这三个数字来判断，这三个数能否构成一个三角形。如果能，是构成等边三角形，等腰直角三角形、等腰三角形，直角三角形，普通三角形，还是其它情况。
(This VB6 program is mainly suitable for beginners. Enter three numbers to represent the three sides of a triangle. Then through these three numbers to judge whether these three numbers can form a triangle. If so, is it an equilateral triangle, an isosceles right triangle, an isosceles triangle, a right triangle, an ordinary triangle, or something else.)