Question

VB SendMessage的参数

Public Declare Function SendMessage& Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) 它的第二项参数 wMsg有哪些？

Answer 1

Window Messages
Const WM_NULL = &H0
Const WM_CREATE = &H1
Const WM_DESTROY = &H2
Const WM_MOVE = &H3
Const WM_SIZE = &H5

Const WM_ACTIVATE = &H6
'
' WM_ACTIVATE state values

Const WA_INACTIVE = 0
Const WA_ACTIVE = 1
Const WA_CLICKACTIVE = 2

Const WM_SETFOCUS = &H7
Const WM_KILLFOCUS = &H8
Const WM_ENABLE = &HA
Const WM_SETREDRAW = &HB
Const WM_SETTEXT = &HC
Const WM_GETTEXT = &HD
Const WM_GETTEXTLENGTH = &HE
Const WM_PAINT = &HF
Const WM_CLOSE = &H10
Const WM_QUERYENDSESSION = &H11
Const WM_QUIT = &H12
Const WM_QUERYOPEN = &H13
Const WM_ERASEBKGND = &H14
Const WM_SYSCOLORCHANGE = &H15
Const WM_ENDSESSION = &H16
Const WM_SHOWWINDOW = &H18
Const WM_WININICHANGE = &H1A
Const WM_DEVMODECHANGE = &H1B
Const WM_ACTIVATEAPP = &H1C
Const WM_FONTCHANGE = &H1D
Const WM_TIMECHANGE = &H1E
Const WM_CANCELMODE = &H1F
Const WM_SETCURSOR = &H20
Const WM_MOUSEACTIVATE = &H21
Const WM_CHILDACTIVATE = &H22
Const WM_QUEUESYNC = &H23

Const WM_GETMINMAXINFO = &H24

Const WM_PAINTICON = &H26
Const WM_ICONERASEBKGND = &H27
Const WM_NEXTDLGCTL = &H28
Const WM_SPOOLERSTATUS = &H2A
Const WM_DRAWITEM = &H2B
Const WM_MEASUREITEM = &H2C
Const WM_DELETEITEM = &H2D
Const WM_VKEYTOITEM = &H2E
Const WM_CHARTOITEM = &H2F
Const WM_SETFONT = &H30
Const WM_GETFONT = &H31
Const WM_SETHOTKEY = &H32
Const WM_GETHOTKEY = &H33
Const WM_QUERYDRAGICON = &H37
Const WM_COMPAREITEM = &H39
Const WM_COMPACTING = &H41
Const WM_OTHERWINDOWCREATED = &H42 ' no longer suported
Const WM_OTHERWINDOWDESTROYED = &H43 ' no longer suported
Const WM_COMMNOTIFY = &H44 ' no longer suported

' notifications passed in low word of lParam on WM_COMMNOTIFY messages
Const CN_RECEIVE = &H1
Const CN_TRANSMIT = &H2
Const CN_EVENT = &H4

Const WM_WINDOWPOSCHANGING = &H46
Const WM_WINDOWPOSCHANGED = &H47

Const WM_POWER = &H48
'
' wParam for WM_POWER window message and DRV_POWER driver notification

Const PWR_OK = 1
Const PWR_FAIL = (-1)
Const PWR_SUSPENDREQUEST = 1
Const PWR_SUSPENDRESUME = 2
Const PWR_CRITICALRESUME = 3

Const WM_COPYDATA = &H4A
Const WM_CANCELJOURNAL = &H4B

Type COPYDATASTRUCT
dwData As Long
cbData As Long
lpData As Long
End Type

Const WM_NCCREATE = &H81
Const WM_NCDESTROY = &H82
Const WM_NCCALCSIZE = &H83
Const WM_NCHITTEST = &H84
Const WM_NCPAINT = &H85
Const WM_NCACTIVATE = &H86
Const WM_GETDLGCODE = &H87
Const WM_NCMOUSEMOVE = &HA0
Const WM_NCLBUTTONDOWN = &HA1
Const WM_NCLBUTTONUP = &HA2
Const WM_NCLBUTTONDBLCLK = &HA3
Const WM_NCRBUTTONDOWN = &HA4
Const WM_NCRBUTTONUP = &HA5
Const WM_NCRBUTTONDBLCLK = &HA6
Const WM_NCMBUTTONDOWN = &HA7
Const WM_NCMBUTTONUP = &HA8
Const WM_NCMBUTTONDBLCLK = &HA9

Const WM_KEYFIRST = &H100
Const WM_KEYDOWN = &H100
Const WM_KEYUP = &H101
Const WM_CHAR = &H102
Const WM_DEADCHAR = &H103
Const WM_SYSKEYDOWN = &H104
Const WM_SYSKEYUP = &H105
Const WM_SYSCHAR = &H106
Const WM_SYSDEADCHAR = &H107
Const WM_KEYLAST = &H108
Const WM_INITDIALOG = &H110
Const WM_COMMAND = &H111
Const WM_SYSCOMMAND = &H112
Const WM_TIMER = &H113
Const WM_HSCROLL = &H114
Const WM_VSCROLL = &H115
Const WM_INITMENU = &H116
Const WM_INITMENUPOPUP = &H117
Const WM_MENUSELECT = &H11F
Const WM_MENUCHAR = &H120
Const WM_ENTERIDLE = &H121

Const WM_CTLCOLORMSGBOX = &H132
Const WM_CTLCOLOREDIT = &H133
Const WM_CTLCOLORLISTBOX = &H134
Const WM_CTLCOLORBTN = &H135
Const WM_CTLCOLORDLG = &H136
Const WM_CTLCOLORSCROLLBAR = &H137
Const WM_CTLCOLORSTATIC = &H138

Const WM_MOUSEFIRST = &H200
Const WM_MOUSEMOVE = &H200
Const WM_LBUTTONDOWN = &H201
Const WM_LBUTTONUP = &H202
Const WM_LBUTTONDBLCLK = &H203
Const WM_RBUTTONDOWN = &H204
Const WM_RBUTTONUP = &H205
Const WM_RBUTTONDBLCLK = &H206
Const WM_MBUTTONDOWN = &H207
Const WM_MBUTTONUP = &H208
Const WM_MBUTTONDBLCLK = &H209
Const WM_MOUSELAST = &H209

Const WM_PARENTNOTIFY = &H210
Const WM_ENTERMENULOOP = &H211
Const WM_EXITMENULOOP = &H212
Const WM_MDICREATE = &H220
Const WM_MDIDESTROY = &H221
Const WM_MDIACTIVATE = &H222
Const WM_MDIRESTORE = &H223
Const WM_MDINEXT = &H224
Const WM_MDIMAXIMIZE = &H225
Const WM_MDITILE = &H226
Const WM_MDICASCADE = &H227
Const WM_MDIICONARRANGE = &H228
Const WM_MDIGETACTIVE = &H229
Const WM_MDISETMENU = &H230
Const WM_DROPFILES = &H233
Const WM_MDIREFRESHMENU = &H234

Const WM_CUT = &H300
Const WM_COPY = &H301
Const WM_PASTE = &H302
Const WM_CLEAR = &H303
Const WM_UNDO = &H304
Const WM_RENDERFORMAT = &H305
Const WM_RENDERALLFORMATS = &H306
Const WM_DESTROYCLIPBOARD = &H307
Const WM_DRAWCLIPBOARD = &H308
Const WM_PAINTCLIPBOARD = &H309
Const WM_VSCROLLCLIPBOARD = &H30A
Const WM_SIZECLIPBOARD = &H30B
Const WM_ASKCBFORMATNAME = &H30C
Const WM_CHANGECBCHAIN = &H30D
Const WM_HSCROLLCLIPBOARD = &H30E
Const WM_QUERYNEWPALETTE = &H30F
Const WM_PALETTEISCHANGING = &H310
Const WM_PALETTECHANGED = &H311
Const WM_HOTKEY = &H312

Const WM_PENWINFIRST = &H380
Const WM_PENWINLAST = &H38F

' NOTE: All Message Numbers below 0x0400 are RESERVED.

' Private Window Messages Start Here:
Const WM_USER = &H400

' WM_SYNCTASK Commands