Declare Function GetOpenFileName Lib "comdlg32.dll" Alias  "GetOpenFileNameA" (pOpenfilename As OPENFILENAME) As Long

what is the meaning of this sentence?

a swp file used in solidworks  to open a txt file, the first line is the sentence above. i am sure this swp file work well two years on other system.

now when i try to run this file in solidworks, a window as attached jump out.

it says that the code has to updated to use on a 64-bit system. both solidworks and computer system are 64-bit.

could you kind help me on how to change this sentence to be used in 64-bit system?

thank you very much!