Syscall index: 0x1802
Function signature: int ConfirmFileOverwriteDialog(unsigned short* filename)
Shows a file overwrite confirmation dialog for the specified filename.\
- filename - 16 bit string that will be shown as the file name to overwrite.\
1 if F1 was pressed (Overwrite OK), 0 if F6, EXIT, or QUIT are pressed (Overwrite not OK).