LabVIEWLabVIEW 实用工具详解.rar

***Windows Message Queue for LabVIEW*** This VI library contains a collection of VIs for intercepting Windows messages in LabVIEW code for programmatic handling. The code will intercept any desired message whether it was posted or sent. Please look at the example included, as well as the floating help for all VIs. **Installation** Copy all files in this zip archive into a subdirectory. It doesn't matter where you put it, but I suggest you put it in LabVIEW\user.lib, so that it shows up on the user libraries palette in LabVIEW. **How it works** A DLL included does all of the dirty work. The VIs in the library are primarily wrappers around the DLL with the exception of Wait for Windows Message.vi. When creating the first Windows message queue, the DLL installs a windows Get Message Hook and a CallMsgProc Hook on the LabVIEW process. This allows the DLL to inspect all messages heading for LabVIEW before LabVIEW processes them. The hook function determines whether each individual message is a message in which the queue is interested. If it is, it adds the message to the queue, and sets an occurrence. The Wait on Windows Message.vi is waiting on the same occurrence, and thus it continues its execution, retrieving the message from the queue. A number of utility functions are also provided for working with the queue. **List of VIs with brief definitions** Create Windows Message Queue: creates a new queue. Wait on Windows Message: asynchronously waits for the next message. Get Next Message: retreives the next message from the queue. Windows Message Queue Size: returns the number of messages waiting in the queue. Flush Windows Message Queue: deletes all messages from the queue. Destroy Windows Message Queue: cleans up a queue after its use. Not a Windows Message Queue: determines if the refnum corresponds to a valid queue. **List of Windows Message** Of course, it is necessary to know the message numbers for the messages which you want to detect. Here is a list, which is probably not the easiest thing to use. This list was extracted from winuser.h, part of the Win32 SDK. For more information on any message, please check the Win32 SDK documentation. This is also where you should go if you would like to figure out which message you need. It can be found at http://www.microsoft.com/library/ #define WM_NULL 0x0000 #define WM_CREATE 0x0001 #define WM_DESTROY 0x0002 #define WM_MOVE 0x0003 #define WM_SIZE 0x0005 #define WM_ACTIVATE 0x0006 #define WM_SETFOCUS 0x0007 #define WM_KILLFOCUS 0x0008 #define WM_ENABLE 0x000A #define WM_SETREDRAW 0x000B #define WM_SETTEXT 0x000C #define WM_GETTEXT 0x000D #define WM_GETTEXTLENGTH 0x000E #define WM_PAINT 0x000F #define WM_CLOSE 0x0010 #define WM_QUERYENDSESSION 0x0011 #define WM_QUIT 0x0012 #define WM_QUERYOPEN 0x0013 #define WM_ERASEBKGND 0x0014 #define WM_SYSCOLORCHANGE 0x0015 #define WM_ENDSESSION 0x0016 #define WM_SHOWWINDOW 0x0018 #define WM_WININICHANGE 0x001A #define WM_SETTINGCHANGE WM_WININICHANGE #define WM_DEVMODECHANGE 0x001B #define WM_ACTIVATEAPP 0x001C #define WM_FONTCHANGE 0x001D #define WM_TIMECHANGE 0x001E #define WM_CANCELMODE 0x001F #define WM_SETCURSOR 0x0020 #define WM_MOUSEACTIVATE 0x0021 #define WM_CHILDACTIVATE 0x0022 #define WM_QUEUESYNC 0x0023 #define WM_GETMINMAXINFO 0x0024 #define WM_PAINTICON 0x0026 #define WM_ICONERASEBKGND 0x0027 #define WM_NEXTDLGCTL 0x0028 #define WM_SPOOLERSTATUS 0x002A #define WM_DRAWITEM 0x002B #define WM_MEASUREITEM 0x002C #define WM_DELETEITEM 0x002D #define WM_VKEYTOITEM 0x002E #define WM_CHARTOITEM 0x002F #define WM_SETFONT 0x0030 #define WM_GETFONT 0x0031 #define WM_SETHOTKEY 0x0032 #define WM_GETHOTKEY 0x0033 #define WM_QUERYDRAGICON 0x0037 #define WM_COMPAREITEM 0x0039 #define WM_GETOBJECT 0x003D #define WM_COMPACTING 0x0041 #define WM_COMMNOTIFY 0x0044 /* no longer suported */ #define WM_WINDOWPOSCHANGING 0x0046 #define WM_WINDOWPOSCHANGED 0x0047 #define WM_POWER 0x0048 #define WM_COPYDATA 0x004A #define WM_CANCELJOURNAL 0x004B #define WM_NOTIFY 0x004E #define WM_INPUTLANGCHANGEREQUEST 0x0050 #define WM_INPUTLANGCHANGE 0x0051 #define WM_TCARD 0x0052 #define WM_HELP 0x0053 #define WM_USERCHANGED 0x0054 #define WM_NOTIFYFORMAT 0x0055 #define WM_CONTEXTMENU 0x007B #define WM_STYLECHANGING 0x007C #define WM_STYLECHANGED 0x007D #define WM_DISPLAYCHANGE 0x007E #define WM_GETICON 0x007F #define WM_SETICON 0x0080 #define WM_NCCREATE 0x0081 #define WM_NCDESTROY 0x0082 #define WM_NCCALCSIZE 0x0083 #define WM_NCHITTEST 0x0084 #define WM_NCPAINT 0x0085 #define WM_NCACTIVATE 0x0086 #define WM_GETDLGCODE 0x0087 #define WM_SYNCPAINT 0x0088 #define WM_NCMOUSEMOVE 0x00A0 #define WM_NCLBUTTONDOWN 0x00A1 #define WM_NCLBUTTONUP 0x00A2 #define WM_NCLBUTTONDBLCLK 0x00A3 #define WM_NCRBUTTONDOWN 0x00A4 #define WM_NCRBUTTONUP 0x00A5 #define WM_NCRBUTTONDBLCLK 0x00A6 #define WM_NCMBUTTONDOWN 0x00A7 #define WM_NCMBUTTONUP 0x00A8 #define WM_NCMBUTTONDBLCLK 0x00A9 #define WM_KEYFIRST 0x0100 #define WM_KEYDOWN 0x0100 #define WM_KEYUP 0x0101 #define WM_CHAR 0x0102 #define WM_DEADCHAR 0x0103 #define WM_SYSKEYDOWN 0x0104 #define WM_SYSKEYUP 0x0105 #define WM_SYSCHAR 0x0106 #define WM_SYSDEADCHAR 0x0107 #define WM_KEYLAST 0x0108 #define WM_IME_STARTCOMPOSITION 0x010D #define WM_IME_ENDCOMPOSITION 0x010E #define WM_IME_COMPOSITION 0x010F #define WM_IME_KEYLAST 0x010F #define WM_INITDIALOG 0x0110 #define WM_COMMAND 0x0111 #define WM_SYSCOMMAND 0x0112 #define WM_TIMER 0x0113 #define WM_HSCROLL 0x0114 #define WM_VSCROLL 0x0115 #define WM_INITMENU 0x0116 #define WM_INITMENUPOPUP 0x0117 #define WM_MENUSELECT 0x011F #define WM_MENUCHAR 0x0120 #define WM_ENTERIDLE 0x0121 #define WM_MENURBUTTONUP 0x0122 #define WM_MENUDRAG 0x0123 #define WM_MENUGETOBJECT 0x0124 #define WM_UNINITM