How to disable computer sleep during critical operation in Delphi

To disable computer sleep during critical operation in Delphi, you can use the Windows API function SetThreadExecutionState. This function allows you to inform the operating system that your application needs to keep the computer awake by preventing it from entering sleep mode.

Here's an example of how you can use SetThreadExecutionState in Delphi:

uses
  Windows;

procedure DisableSleep;
begin
  // Prevent the computer from entering sleep mode
  SetThreadExecutionState(ES_CONTINUOUS or ES_SYSTEM_REQUIRED or ES_AWAYMODE_REQUIRED);
end;

procedure EnableSleep;
begin
  // Allow the computer to enter sleep mode again
  SetThreadExecutionState(ES_CONTINUOUS);
end;

You can call the DisableSleep function before starting your critical operation, and EnableSleep after the operation is completed. Note that calling SetThreadExecutionState with ES_SYSTEM_REQUIRED or ES_AWAYMODE_REQUIRED will not guarantee that the computer will not enter sleep mode. Other factors, such as power settings and user activity, can still cause the computer to enter sleep mode.

0 Jhon77 3/12/2015