AutoHotkey Community

; Example along with the GetPriority() Function.

Run, calc.exe
WinWait, Calculator
Process, Exist, calc.exe
PID := ErrorLevel

Process, Priority, %PID%, Low
MsgBox, 64, Process Priority [CALC.EXE], % GetPriority("calc.exe")

Process, Priority, %PID%, BelowNormal
MsgBox, 64, Process Priority [CALC.EXE], % GetPriority("calc.exe")

Process, Priority, %PID%, AboveNormal
MsgBox, 64, Process Priority [CALC.EXE], % GetPriority("calc.exe")

Process, Priority, %PID%, High
MsgBox, 64, Process Priority [CALC.EXE], % GetPriority("calc.exe")

Process, Priority, %PID%, Realtime
MsgBox, 64, Process Priority [CALC.EXE], % GetPriority("calc.exe")

Process, Priority, %PID%, Normal
MsgBox, 64, Process Priority [CALC.EXE], % GetPriority("calc.exe")

Return

; The Function

GetPriority(process="") {
 Process, Exist, %process%
 PID := ErrorLevel
 IfLessOrEqual, PID, 0, Return, "Error!"

 hProcess := DllCall("OpenProcess", Int,1024, Int,0, Int,PID)
 Priority := DllCall("GetPriorityClass", Int,hProcess)
 DllCall("CloseHandle", Int,hProcess)

 IfEqual, Priority, 64   , Return, "Low"
 IfEqual, Priority, 16384, Return, "BelowNormal"
 IfEqual, Priority, 32   , Return, "Normal"
 IfEqual, Priority, 32768, Return, "AboveNormal"
 IfEqual, Priority, 128  , Return, "High"
 IfEqual, Priority, 256  , Return, "Realtime"
Return ""
}

GetFileFolderSize(fPath="") {

IfNotExist, %fPath%, Return, -1     ; file/path not found!
StringRight, LChar, fPath, 1

If (StrLen(fPath) != 3 AND LChar = "\")
   StringTrimRight, fPath, fPath, 1

FileGetAttrib, Attributes, %fPath%  ; to ascertain file/folder

If (!InStr(Attributes,"D")) {       ; if path is a file
   FileGetSize, FileSize, %fPath%
   Return FileSize
                            }

If (InStr(Attributes,"D"))  {       ; if path is a folder
   Loop, %fPath%\*.*, 1, 1
      FolderSize += %A_LoopFileSize%
   Return FolderSize
                            }
Return -2                           ; unknown error!
}

GetFileFolderSize(fPath="") {
  If InStr( FileExist( fPath ), "D" ) {
     Loop, %fPath%\*.*, 1, 1
        FolderSize += %A_LoopFileSize%
     Return FolderSize ? FolderSize : 0
  } Else
  If ( FileExist( fPath ) <> "" ) {
     FileGetSize, FileSize, %fPath%
     Return FileSize ? FileSize : 0
  } Else
Return -1
}