FileSize says file does not exist

[PB]

> What's your case scenario for your project?

I need to launch system apps for the user. Mobility Center was one,
but then I discovered the path used to run it with RunProgram wasn't
working, even though I knew the file existed, but FileSize said it didn't.

Code: Select all

; This FAILS on a 32-bit app running on a 64-bit PC.
RunProgram("C:\Windows\System32\mblctr.exe")

[Thunder93]

Different ways.. but depends on your needs.

Here's one example of many.

Code: Select all

Global Is64OS.l, EnvirSys32.s = GetEnvironmentVariable("SystemRoot")

CompilerIf #PB_Compiler_Processor = #PB_Processor_x86
  Is64OS = Bool(FileSize(EnvirSys32+"\SysWOW64\"))
CompilerEndIf

If Is64OS : EnvirSys32 + "\SysNative\"
  Else : EnvirSys32 + "\System32\"
EndIf

Debug FileSize(EnvirSys32+"mblctr.exe")
Debug EnvirSys32

[PB]

This...

CompilerIf #PB_Compiler_Processor = #PB_Processor_x86

...is not a solution, because it's NOT runtime. It sets the processor
type ONCE for the exe it creates. So if I compile my exe on a 64-bit
PC and then run it on a 32-bit, then Is64OS will be true on the 32-bit.
That's why we need a runtime command for PureBasic that returns the
processor type. It's been requested before but never added.

[Thunder93]

You can run 64App on 32Bit OS?

[ts-soft]

This...

CompilerIf #PB_Compiler_Processor = #PB_Processor_x86

checks only, you are compiling in 32-Bit. This have nothing to do with
the OS! You can remove this, if you compile your source always in 32-Bit.

You can't change the pb compiler at runtime, i hope

[PB]

What I mean is this:

Code: Select all

CompilerIf #PB_Compiler_Processor = #PB_Processor_x86
  MessageRequester("Result","32")
CompilerElse
  MessageRequester("Result","64")
CompilerEndIf

If I compile an exe with this on a 32-bit PC, but then run the
exe on a 64-bit PC, the result will show "32", which is wrong.

No code in the 64-bit block will get executed because the exe
was built on a 32-bit PC due to CompilerIf locking the code.

[Thunder93]

There is a misunderstanding here or something...

If you make 32bit App, this will always check regardless if you on x86 or x64 OS .. to see if you have that \SysWOW64\ directory.

[ts-soft]

What I mean is this:

Code: Select all

CompilerIf #PB_Compiler_Processor = #PB_Processor_x86
  MessageRequester("Result","32")

This mean, you are using the 32-Bit Version of purebasic, nothing more.

[Fred]

We use regular Windows API to check the file size, so I bet it's an OS quirck and we won't fix that as it will probably brings other issues.

[PB]

> This mean, you are using the 32-Bit Version of purebasic, nothing more

Yes, which means Thunder93's code example is totally pointless.

[Thunder93]

Its only pointless if one doesn't follow.

If you creating 64bit App, nothing needs to change. You should be calling the 64bit system versions on Windows x64.

If you creating a 32bit App, then you must also check to see if your 32bit App is running on a 64bit Windows.


With my existing code, and if I compile 32bit App. The following line will run the respectful version of the file. If I'm on the 32bit OS, works. If I'm on the 64bit OS, it works.

Code: Select all

RunProgram(EnvirSys32+"mblctr.exe")