If your database is an ACCDB file with no APIs and no ActiveX controls it may not need any conversion.
However....
1. ACCDE files will only run in the same 'bitness' they were created. You will need a 64-bit ACCDE if xo.
2. All API declarations will need to be modified for 64-bit using PtrSafe as well as LongPtr for pointers.
If some users will still be running A2007 or earlier you will need conditional compilation
Code:
If VBA7 Then
Declare PtrSafe ….
#Else
Declare
#End if
3. Some ActiveX controls do not work in 64-bit e.g. Flexgrid and Treeview. If you use any that don't run in 64-bit, you will need alterntive code.
Phillip Stiefel has also done a very good guide to conversions https://codekabinett.com/rdumps.php?...ion-vba-64-bit
Here is an MS guide https://docs.microsoft.com/en-us/off...ions-of-office