ScreenSaverProc function (scrnsave.h)

Article
02/22/2024

Receives messages sent to the specified screen saver window.

Syntax

LRESULT ScreenSaverProc(
  HWND   hWnd,
  UINT   message,
  WPARAM wParam,
  LPARAM lParam
);

Parameters

hWnd

Type: HWND

An identifier of the window.

message

Type: UINT

A message sent to the screen saver window.

wParam

Type: WPARAM

Additional message-specific information.

lParam

Type: LPARAM

Additional message-specific information.

Return value

Type: LONG

The return value is the result of the message processing and depends on the message sent.

Remarks

A screen saver's ScreenSaverProc window procedure should use the DefScreenSaverProc function instead of the DefWindowProc function to provide default message processing. The DefScreenSaverProc function passes any messages that do not affect screen saver operations to DefWindowProc.

The ScreenSaverProc function must be exported by including it in the EXPORTS statement in the application's module-definition (.def) file.

Requirements

Requirement	Value
Minimum supported client	Windows XP [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Target Platform	Windows
Header	scrnsave.h
Library	Scrnsave.lib
DLL	None

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