Тут был вопрос по поводу как словить клавиши в винде. А если..

← →
Wadim (2006-11-16 02:55) [0]

Тут был вопрос по поводу как словить клавиши в винде. Насчет хуков верно, но их тоже можно ловить (или я не прав)
я использую такой метод (прошу не перекидать данную тему в другой раздел, т.к. все равно на апи)
Что скажите? Какие недостатки:
repeat E:=GetAsyncKeyState(R); if (e<>0) then begin //тут обработка не только нажатия клавиш, но и мышки, шифтов и т.д., вообще "лубой" кнопки в кинде end; r:=r+1; until r=255;

← →
Eraser © (2006-11-16 03:12) [1]

> [0] Wadim (16.11.06 02:55)

> Что скажите?

плохой способ. хуки не просто так придумали. поставь локальный хук и не мучайся.

← →
Wadim (2006-11-16 03:16) [2]

А что значить локальный хук?
Меня интересует перехват при любом состоянии своего приложения, всмысле свернут, спрятан и т.д.

← →
Elen © (2006-11-16 08:34) [3]

> Wadim

А где это ты предлагаеш исполнять?

> [2] Wadim (16.11.06 03:16)

тогда глобальный.

вот может полезен код будет, правда на C++

#define WINVER 0x0400 #define _WIN32_WINNT 0x0400 #include "LowLevelHook.h" #include "res/resource.h" HWND LowLevelHook::g_hwndVNCViewer=NULL; DWORD LowLevelHook::g_VncProcessID=0; BOOL LowLevelHook::g_fHookActive=FALSE; HHOOK LowLevelHook::g_HookID=0; BOOL LowLevelHook::g_fGlobalScrollLock=FALSE; BOOL LowLevelHook::Initialize(HWND hwndMain) { HINSTANCE hInstance = NULL ; g_hwndVNCViewer = NULL ; g_fHookActive = GetScrollLockState() ; g_VncProcessID = 0 ; g_HookID = 0 ; g_fGlobalScrollLock = FALSE ; //Store our window"s handle g_hwndVNCViewer = hwndMain; if (g_hwndVNCViewer==NULL) return FALSE; //Get the HInstacne of this window //(required because LowLevel-Keyboard-Hook must be global, // and need the HMODULE parameter in SetWindowsHookEx) hInstance = (HINSTANCE)GetWindowLong(g_hwndVNCViewer,GWL_HINSTANCE); if (hInstance==NULL) return FALSE; // //Store the ProcessID of the VNC window. //this will prevent the keyboard hook procedure to interfere //with keypressed in other processes" windows GetWindowThreadProcessId(g_hwndVNCViewer,&g_VncProcessID); //Try to set the hook procedure g_HookID = SetWindowsHookEx(WH_KEYBOARD_LL,VncLowLevelKbHookProc,hInstance,0); if (g_HookID==0) { DWORD dw = GetLastError(); //TODO: //Analyze why the error occured (might be because we"re under Win98/95/ME?) return FALSE ; } return TRUE; } BOOL LowLevelHook::Release() { if (g_HookID!=0) { return UnhookWindowsHookEx(g_HookID); } return FALSE; } BOOL LowLevelHook::GetScrollLockState() { BYTE keyState[256]; GetKeyboardState((LPBYTE)&keyState); return (keyState[VK_SCROLL] & 1); } LRESULT CALLBACK LowLevelHook::VncLowLevelKbHookProc(INT nCode, WPARAM wParam, LPARAM lParam) { //if set to TRUE, the key-pressed message will NOT be passed on to windows. BOOL fHandled = FALSE; BOOL fKeyDown = FALSE; if (nCode == HC_ACTION) { KBDLLHOOKSTRUCT *pkbdllhook = (KBDLLHOOKSTRUCT *)lParam; DWORD ProcessID ; //Get the process ID of the Active Window //(The window with the input focus) GetWindowThreadProcessId(GetFocus(),&ProcessID); //only if this is "our" process (vncviewer"s process) //we should intecept the key-presses if (ProcessID==g_VncProcessID) { fKeyDown = ( (wParam==WM_KEYDOWN) || (wParam==WM_SYSKEYDOWN) ); switch (pkbdllhook->vkCode) { //Print Screen Key // Request Full screen Update // Simulate a "Request Refresh" from the System Menu case VK_SNAPSHOT: if (fKeyDown && g_fHookActive) { PostMessage(g_hwndVNCViewer,WM_SYSCOMMAND,ID_REQUEST_REFRESH,0); fHandled = TRUE; } break ; //Pause Key // Toggle FullScreen On/Off // Simulate a "FullScreen" from the System Menu case VK_PAUSE: if (fKeyDown && g_fHookActive) { PostMessage(g_hwndVNCViewer,WM_SYSCOMMAND,ID_FULLSCREEN,0); fHandled = TRUE; } break ; //Left or Right CONTROL keys // Simulate a "Send CONTROL up/down" from the System Menu case VK_LCONTROL: case VK_RCONTROL: if (g_fHookActive) { if(fKeyDown) PostMessage(g_hwndVNCViewer,WM_SYSCOMMAND,ID_CONN_CTLDOWN,0); else PostMessage(g_hwndVNCViewer,WM_SYSCOMMAND,ID_CONN_CTLUP,0); fHandled = TRUE; } break; //Either Left or Right ALT keys // Simulate a "Send ALT up/down" from the System Menu case VK_LMENU: case VK_RMENU: if (g_fHookActive) { if(fKeyDown) PostMessage(g_hwndVNCViewer,WM_SYSCOMMAND,ID_CONN_ALTDOWN,0); else PostMessage(g_hwndVNCViewer,WM_SYSCOMMAND,ID_CONN_ALTUP,0); fHandled = TRUE; } break; case VK_LWIN: if (g_fHookActive) { if(fKeyDown) PostMessage(g_hwndVNCViewer,WM_SYSCOMMAND,ID_VK_LWINDOWN,0); else PostMessage(g_hwndVNCViewer,WM_SYSCOMMAND,ID_VK_LWINUP,0); fHandled = TRUE; } break; case VK_RWIN: if (g_fHookActive) { if(fKeyDown) PostMessage(g_hwndVNCViewer,WM_SYSCOMMAND,ID_VK_RWINDOWN,0); else PostMessage(g_hwndVNCViewer,WM_SYSCOMMAND,ID_VK_RWINUP,0); fHandled = TRUE; } break; case VK_APPS: if (g_fHookActive) { if(fKeyDown) PostMessage(g_hwndVNCViewer,WM_SYSCOMMAND,ID_VK_APPSDOWN,0); else PostMessage(g_hwndVNCViewer,WM_SYSCOMMAND,ID_VK_APPSUP,0); fHandled = TRUE;

} break; //Scroll Lock = Turn the whole thing on or off //This is a little tricky hack: //Windows sets the scroll-lock LED on or off when the user PRESSes the scroll-lock key. //We"ll check the LED state when the user RELEASEs the key, so the LED is already set. //If the LED/ScrollLock is ON, we"ll activate the special key interception. case VK_SCROLL: if (!fKeyDown) { g_fHookActive = GetScrollLockState(); } break; //SPACEBAR = When key interception is Active, no special handling is required for "spacebar". //But when key interception is turned off, I want ALT+SPACE to open the VNCViewer"s System Menu. case VK_SPACE: if (!g_fHookActive) { if (pkbdllhook->flags & LLKHF_ALTDOWN) { if(!fKeyDown) PostMessage(g_hwndVNCViewer,WM_SYSCOMMAND,0xF100,0x20); fHandled = TRUE; } } break ; //TAB = If the user presses ALT+TAB, we must block the TAB key (fHandled=TRUE), //Otherwise windows (on the VNCViewer"s side) will switch to another application. //But because we block the TAB key, the "ClientConnection" window won"t know to send //a TAB key to the VNCServer. so we simulate a TAB key pressed. //(The ALT key down was already sent to the VNCServer when the user pressed ALT) case VK_TAB: if (g_fHookActive) { if (pkbdllhook->flags & LLKHF_ALTDOWN) { if(fKeyDown) PostMessage(g_hwndVNCViewer,WM_KEYDOWN,VK_TAB,0); /* Implementation Note: Don"t send the Key-UP event, it confuses Windows on the server side. (It makes Windows switch TWO applications at a time). This way it works OK on servers running Win98, Win2K, WinXP and Linux+IceWM. Should test it with more servers to make sure it"s OK. */ fHandled = TRUE; } } break; //ESCAPE = ALT+ESC is also a way to switch application, so we block the ESCAPE key, //Otherwise windows (on the VNCViewer"s side) will switch to another application. //Transmitting the ALT+ESCAPE combination to a VNCServer running Windows doesn"t work //very well, so for now, we"ll just block the ALT+ESCAPE combination. //(CTRL+ESC work OK, BTW) case VK_ESCAPE: if (g_fHookActive) { if (pkbdllhook->flags & LLKHF_ALTDOWN) { fHandled = TRUE; } } break; } //switch(pkbdllhook->vkCode) } // if (ProcessID == g_VncProcesID) } // if (nCode==HT_ACTION) //Call the next hook, if we didn"t handle this message return (fHandled ? TRUE : CallNextHookEx(g_HookID, nCode, wParam, lParam));

Тут был вопрос по поводу как словить клавиши в винде. А если.. Найти похожие ветки