is it different to put the function in different place?

[Angela2010]

Hi all ,
I have written a program ,I want to realize the two different functions in respective Menu lists in MFC.one menu is "Init" to initiate the instrument ,the other is "zernike" to calculate something .
there is nothing wrong after compiling , but the result is different when I put the code in the two menu response functions. in fact if I put them in either "oninit()"or "onzernike()", I can get the result I want , but then the two different functions mixed together.if I put the corresponding part of the code in each responding function . nothing is wrong with compiling. but the result is strange when execute .
part of the code:

void CTest1View::OnInit() 
{
   .....
   if(err = WFS_GetMlaCount (instr.handle, &instr.mla_cnt))
		handle_errors(err);
  ....
}

void CTest1View::OnZernike() 
{
   ......
  if(err = WFS_CalcBeamCentroidDia (instr.handle, &beam_centroid_x))
      handle_errors(err);
   ......
}

in the above code, instr is an object of a class I defined to put some variables. I define the object in C**view,public, why the result is different when the code is like this:

void CTest1View::OnInit() 
{
   .....
   if(err = WFS_GetMlaCount (instr.handle, &instr.mla_cnt))
		handle_errors(err);
  ....
    if(err = WFS_CalcBeamCentroidDia (instr.handle, &beam_centroid_x))
      handle_errors(err);
   ......
}