C# Signature:
[DllImport("user32.dll")]
static extern IntPtr SetWinEventHook(uint eventMin, uint eventMax, IntPtr
hmodWinEventProc, WinEventDelegate lpfnWinEventProc, uint idProcess,
uint idThread, uint dwFlags);
VB Signature:
<System.Runtime.InteropServices.DllImport("user32.dll", EntryPoint:="SetWinEventHook")> _
Private Shared Function SetWinEventHook( _
ByVal eventMin As UInteger, _
ByVal eventMax As UInteger, _
ByVal hmodWinEventProc As IntPtr, _
ByVal lpfnWinEventProc As WinEventDelegate, _
ByVal idProcess As UInteger, _
ByVal idThread As UInteger, _
ByVal dwFlags As UInteger _
) As IntPtr
End Function
User-Defined Types:
C# Constants:
const uint WINEVENT_OUTOFCONTEXT = 0x0000; // Events are ASYNC
const uint WINEVENT_SKIPOWNTHREAD = 0x0001; // Don't call back for events on installer's thread
const uint WINEVENT_SKIPOWNPROCESS = 0x0002; // Don't call back for events on installer's process
const uint WINEVENT_INCONTEXT = 0x0004; // Events are SYNC, this causes your dll to be injected into every process
const uint EVENT_MIN = 0x00000001;
const uint EVENT_MAX = 0x7FFFFFFF;
const uint EVENT_SYSTEM_SOUND = 0x0001;
const uint EVENT_SYSTEM_ALERT = 0x0002;
const uint EVENT_SYSTEM_FOREGROUND = 0x0003;
const uint EVENT_SYSTEM_MENUSTART = 0x0004;
const uint EVENT_SYSTEM_MENUEND = 0x0005;
const uint EVENT_SYSTEM_MENUPOPUPSTART = 0x0006;
const uint EVENT_SYSTEM_MENUPOPUPEND = 0x0007;
const uint EVENT_SYSTEM_CAPTURESTART = 0x0008;
const uint EVENT_SYSTEM_CAPTUREEND = 0x0009;
const uint EVENT_SYSTEM_MOVESIZESTART = 0x000A;
const uint EVENT_SYSTEM_MOVESIZEEND = 0x000B;
const uint EVENT_SYSTEM_CONTEXTHELPSTART = 0x000C;
const uint EVENT_SYSTEM_CONTEXTHELPEND = 0x000D;
const uint EVENT_SYSTEM_DRAGDROPSTART = 0x000E;
const uint EVENT_SYSTEM_DRAGDROPEND = 0x000F;
const uint EVENT_SYSTEM_DIALOGSTART = 0x0010;
const uint EVENT_SYSTEM_DIALOGEND = 0x0011;
const uint EVENT_SYSTEM_SCROLLINGSTART = 0x0012;
const uint EVENT_SYSTEM_SCROLLINGEND = 0x0013;
const uint EVENT_SYSTEM_SWITCHSTART = 0x0014;
const uint EVENT_SYSTEM_SWITCHEND = 0x0015;
const uint EVENT_SYSTEM_MINIMIZESTART = 0x0016;
const uint EVENT_SYSTEM_MINIMIZEEND = 0x0017;
const uint EVENT_SYSTEM_DESKTOPSWITCH = 0x0020;
const uint EVENT_SYSTEM_END = 0x00FF;
const uint EVENT_OEM_DEFINED_START = 0x0101;
const uint EVENT_OEM_DEFINED_END = 0x01FF;
const uint EVENT_UIA_EVENTID_START = 0x4E00;
const uint EVENT_UIA_EVENTID_END = 0x4EFF;
const uint EVENT_UIA_PROPID_START = 0x7500;
const uint EVENT_UIA_PROPID_END = 0x75FF;
const uint EVENT_CONSOLE_CARET = 0x4001;
const uint EVENT_CONSOLE_UPDATE_REGION = 0x4002;
const uint EVENT_CONSOLE_UPDATE_SIMPLE = 0x4003;
const uint EVENT_CONSOLE_UPDATE_SCROLL = 0x4004;
const uint EVENT_CONSOLE_LAYOUT = 0x4005;
const uint EVENT_CONSOLE_START_APPLICATION = 0x4006;
const uint EVENT_CONSOLE_END_APPLICATION = 0x4007;
const uint EVENT_CONSOLE_END = 0x40FF;
const uint EVENT_OBJECT_CREATE = 0x8000; // hwnd ID idChild is created item
const uint EVENT_OBJECT_DESTROY = 0x8001; // hwnd ID idChild is destroyed item
const uint EVENT_OBJECT_SHOW = 0x8002; // hwnd ID idChild is shown item
const uint EVENT_OBJECT_HIDE = 0x8003; // hwnd ID idChild is hidden item
const uint EVENT_OBJECT_REORDER = 0x8004; // hwnd ID idChild is parent of zordering children
const uint EVENT_OBJECT_FOCUS = 0x8005; // hwnd ID idChild is focused item
const uint EVENT_OBJECT_SELECTION = 0x8006; // hwnd ID idChild is selected item (if only one), or idChild is OBJID_WINDOW if complex
const uint EVENT_OBJECT_SELECTIONADD = 0x8007; // hwnd ID idChild is item added
const uint EVENT_OBJECT_SELECTIONREMOVE = 0x8008; // hwnd ID idChild is item removed
const uint EVENT_OBJECT_SELECTIONWITHIN = 0x8009; // hwnd ID idChild is parent of changed selected items
const uint EVENT_OBJECT_STATECHANGE = 0x800A; // hwnd ID idChild is item w/ state change
const uint EVENT_OBJECT_LOCATIONCHANGE = 0x800B; // hwnd ID idChild is moved/sized item
const uint EVENT_OBJECT_NAMECHANGE = 0x800C; // hwnd ID idChild is item w/ name change
const uint EVENT_OBJECT_DESCRIPTIONCHANGE = 0x800D; // hwnd ID idChild is item w/ desc change
const uint EVENT_OBJECT_VALUECHANGE = 0x800E; // hwnd ID idChild is item w/ value change
const uint EVENT_OBJECT_PARENTCHANGE = 0x800F; // hwnd ID idChild is item w/ new parent
const uint EVENT_OBJECT_HELPCHANGE = 0x8010; // hwnd ID idChild is item w/ help change
const uint EVENT_OBJECT_DEFACTIONCHANGE = 0x8011; // hwnd ID idChild is item w/ def action change
const uint EVENT_OBJECT_ACCELERATORCHANGE = 0x8012; // hwnd ID idChild is item w/ keybd accel change
const uint EVENT_OBJECT_INVOKED = 0x8013; // hwnd ID idChild is item invoked
const uint EVENT_OBJECT_TEXTSELECTIONCHANGED = 0x8014; // hwnd ID idChild is item w? test selection change
const uint EVENT_OBJECT_CONTENTSCROLLED = 0x8015;
const uint EVENT_SYSTEM_ARRANGMENTPREVIEW = 0x8016;
const uint EVENT_OBJECT_END = 0x80FF;
const uint EVENT_AIA_START = 0xA000;
const uint EVENT_AIA_END = 0xAFFF;
Notes:
The MSDN documentation states:
When you use a Win32 API that has a callback in managed code, such as SetWinEventHook, you should use GCHandle class structure to avoid exceptions.
This is apparently not accurate as the P/Invoke layer automatically generates a marshaling stub at a fixed address:
http://blogs.msdn.com/cbrumme/archive/2003/05/06/51385.aspx
Tips & Tricks:
Please add some!
Sample Code:
Please add some!
Alternative Managed API:
The ManagedWindowsApi project (http://mwinapi.sourceforge.net) provides a SystemAccessibleObject class to access accessible objects and handle accessible events.
