Why we should not use platform builder to include or exclude a module!!! [WinCE]

Many time we wish to remove or add a module in project. We usually follow two technique.
1. Edit the dirs file
2. Right click the module in platform builder and select exclude from build.

Both works fine.
But in few scenario, second option can cause problem.
Suppose you have two folder lets say A and B.
After building A, we get A.lib. And similarly after building B, we get B.dll but this B.dll uses A.lib to build successfully. Now if you want to remove B, so you would like to remove A and B, both. So you might use the sequence, First A then B or B first then A.
So in the same way, actually module get deleted from dirs file also. So once you plan to include, the module will be added at the end of dirs file. Hence once you choosed B first and then A. In that case, either the b.dll will not be build successfully or it will be build with old A.lib, hence your changes in A.Lib will not be reflected(if you are not going to build A.lib again).

Hence  it is wisely suggested that always edit dirs directly.