关于MFC 计算器响应键盘消息及虚拟键码

这里说一下在基于对话框的简单计算器中如何响应键盘消息，以及普通键盘与笔记本键盘的虚拟键码。

在虚函数PreTranslateMessage(MSG* pMsg) 中来响应键盘消息。

BOOL CCalculatorDlg::PreTranslateMessage(MSG* pMsg) 
{
	// TODO: Add your specialized code here and/or call the base class
	if(pMsg->message ==WM_KEYDOWN)
	{
 		switch(pMsg->wParam)
		{
		case 0x30:      //主键盘
		case VK_NUMPAD0: //小键盘
			OnButton0();
			break;
		case 0x31:
		case VK_NUMPAD1 :
			OnButton1();
			break;
		case 0x32:
		case VK_NUMPAD2 :
			OnButton2();
			break;
		case 0x33:
		case VK_NUMPAD3:
			OnButton3();
			break;
		case 0x34:
		case VK_NUMPAD4 :
			OnButton4();
			break;
		case 0x35:
		case VK_NUMPAD5 :
			OnButton5();
			break;
		case 0x36:
		case VK_NUMPAD6:
			OnButton6();
			break;
		case 0x37:
		case VK_NUMPAD7 :
			OnButton7();
			break;
		case 0x38:
			if(GetKeyState(VK_SHIFT)<0)	//按键（8 *）
				OnMultiply();
			else
				OnButton8();
			break;
		case VK_NUMPAD8 :
			OnButton8();
			break;
		case 0x39:
		case VK_NUMPAD9:
			OnButton9();
			break;
		case 0xBE:
		case VK_DECIMAL:
			OnPoint();
			break;
		case 0xBB: 
			if(GetKeyState(VK_SHIFT)<0)	//按键（+ =）	
				OnAdd();
			else
				OnEqual();
			break;
		case VK_ADD:
			OnAdd();
			break;
		case 0xBD:
		case VK_SUBTRACT:
			OnSubtract();
			break;
		case VK_MULTIPLY:
			OnMultiply();
			break;
		case 0xBF:
			if(GetKeyState(VK_SHIFT)<0) //按键（？/）
				OnDivide();
			break;
		case VK_DIVIDE:
			OnDivide();
			break;
		
		case VK_RETURN:
			OnEqual();
			break;
		case VK_ESCAPE:
		case VK_BACK:
			OnClear();
			break;
		}
		return FALSE;
 	}
	return CDialog::PreTranslateMessage(pMsg);
}

附虚拟键码表：

List of Virtual Key Codes

Following is a full list of VK codes that can be assigned to physical keys ("scan codes") in the Low-level editor.

The list is divided in two categories:

1. "Mappable" codes, to which Unicode characters can be assigned in the High-level editor
2. "Non-mappable" codes (modifiers, special keys)

"Mappable" codes

"Non-mappable" codes

Name Numeric value Description VK_ABNT_C1 0xC1 Abnt C1 VK_ABNT_C2 0xC2 Abnt C2 VK_ADD 0x6B Numpad + VK_ATTN 0xF6 Attn VK_BACK 0x08 Backspace VK_CANCEL 0x03 Break VK_CLEAR 0x0C Clear VK_CRSEL 0xF7 Cr Sel VK_DECIMAL 0x6E Numpad . VK_DIVIDE 0x6F Numpad / VK_EREOF 0xF9 Er Eof VK_ESCAPE 0x1B Esc VK_EXECUTE 0x2B Execute VK_EXSEL 0xF8 Ex Sel VK_ICO_CLEAR 0xE6 IcoClr VK_ICO_HELP 0xE3 IcoHlp VK_KEY_0 0x30 ('0') 0 VK_KEY_1 0x31 ('1') 1 VK_KEY_2 0x32 ('2') 2 VK_KEY_3 0x33 ('3') 3 VK_KEY_4 0x34 ('4') 4 VK_KEY_5 0x35 ('5') 5 VK_KEY_6 0x36 ('6') 6 VK_KEY_7 0x37 ('7') 7 VK_KEY_8 0x38 ('8') 8 VK_KEY_9 0x39 ('9') 9 VK_KEY_A 0x41 ('A') A VK_KEY_B 0x42 ('B') B VK_KEY_C 0x43 ('C') C VK_KEY_D 0x44 ('D') D VK_KEY_E 0x45 ('E') E VK_KEY_F 0x46 ('F') F VK_KEY_G 0x47 ('G') G VK_KEY_H 0x48 ('H') H VK_KEY_I 0x49 ('I') I VK_KEY_J 0x4A ('J') J VK_KEY_K 0x4B ('K') K VK_KEY_L 0x4C ('L') L VK_KEY_M 0x4D ('M') M VK_KEY_N 0x4E ('N') N VK_KEY_O 0x4F ('O') O VK_KEY_P 0x50 ('P') P VK_KEY_Q 0x51 ('Q') Q VK_KEY_R 0x52 ('R') R VK_KEY_S 0x53 ('S') S VK_KEY_T 0x54 ('T') T VK_KEY_U 0x55 ('U') U VK_KEY_V 0x56 ('V') V VK_KEY_W 0x57 ('W') W VK_KEY_X 0x58 ('X') X VK_KEY_Y 0x59 ('Y') Y VK_KEY_Z 0x5A ('Z') Z VK_MULTIPLY 0x6A Numpad * VK_NONAME 0xFC NoName VK_NUMPAD0 0x60 Numpad 0 VK_NUMPAD1 0x61 Numpad 1 VK_NUMPAD2 0x62 Numpad 2 VK_NUMPAD3 0x63 Numpad 3 VK_NUMPAD4 0x64 Numpad 4 VK_NUMPAD5 0x65 Numpad 5 VK_NUMPAD6 0x66 Numpad 6 VK_NUMPAD7 0x67 Numpad 7 VK_NUMPAD8 0x68 Numpad 8 VK_NUMPAD9 0x69 Numpad 9 VK_OEM_1 0xBA OEM_1 (: ;) VK_OEM_102 0xE2 OEM_102 (> <) VK_OEM_2 0xBF OEM_2 (? /) VK_OEM_3 0xC0 OEM_3 (~ `) VK_OEM_4 0xDB OEM_4 ({ [) VK_OEM_5 0xDC OEM_5 (| \) VK_OEM_6 0xDD OEM_6 (} ]) VK_OEM_7 0xDE OEM_7 (" ') VK_OEM_8 0xDF OEM_8 (§ !) VK_OEM_ATTN 0xF0 Oem Attn VK_OEM_AUTO 0xF3 Auto VK_OEM_AX 0xE1 Ax VK_OEM_BACKTAB 0xF5 Back Tab VK_OEM_CLEAR 0xFE OemClr VK_OEM_COMMA 0xBC OEM_COMMA (< ,) VK_OEM_COPY 0xF2 Copy VK_OEM_CUSEL 0xEF Cu Sel VK_OEM_ENLW 0xF4 Enlw VK_OEM_FINISH 0xF1 Finish VK_OEM_FJ_LOYA 0x95 Loya VK_OEM_FJ_MASSHOU 0x93 Mashu VK_OEM_FJ_ROYA 0x96 Roya VK_OEM_FJ_TOUROKU 0x94 Touroku VK_OEM_JUMP 0xEA Jump VK_OEM_MINUS 0xBD OEM_MINUS (_ -) VK_OEM_PA1 0xEB OemPa1 VK_OEM_PA2 0xEC OemPa2 VK_OEM_PA3 0xED OemPa3 VK_OEM_PERIOD 0xBE OEM_PERIOD (> .) VK_OEM_PLUS 0xBB OEM_PLUS (+ =) VK_OEM_RESET 0xE9 Reset VK_OEM_WSCTRL 0xEE WsCtrl VK_PA1 0xFD Pa1 VK_PACKET 0xE7 Packet VK_PLAY 0xFA Play VK_PROCESSKEY 0xE5 Process VK_RETURN 0x0D Enter VK_SELECT 0x29 Select VK_SEPARATOR 0x6C Separator VK_SPACE 0x20 Space VK_SUBTRACT 0x6D Num - VK_TAB 0x09 Tab VK_ZOOM 0xFB Zoom

Name Numeric value Description VK__none_ 0xFF no VK mapping VK_ACCEPT 0x1E Accept VK_APPS 0x5D Context Menu VK_BROWSER_BACK 0xA6 Browser Back VK_BROWSER_FAVORITES 0xAB Browser Favorites VK_BROWSER_FORWARD 0xA7 Browser Forward VK_BROWSER_HOME 0xAC Browser Home VK_BROWSER_REFRESH 0xA8 Browser Refresh VK_BROWSER_SEARCH 0xAA Browser Search VK_BROWSER_STOP 0xA9 Browser Stop VK_CAPITAL 0x14 Caps Lock VK_CONVERT 0x1C Convert VK_DELETE 0x2E Delete VK_DOWN 0x28 Arrow Down VK_END 0x23 End VK_F1 0x70 F1 VK_F10 0x79 F10 VK_F11 0x7A F11 VK_F12 0x7B F12 VK_F13 0x7C F13 VK_F14 0x7D F14 VK_F15 0x7E F15 VK_F16 0x7F F16 VK_F17 0x80 F17 VK_F18 0x81 F18 VK_F19 0x82 F19 VK_F2 0x71 F2 VK_F20 0x83 F20 VK_F21 0x84 F21 VK_F22 0x85 F22 VK_F23 0x86 F23 VK_F24 0x87 F24 VK_F3 0x72 F3 VK_F4 0x73 F4 VK_F5 0x74 F5 VK_F6 0x75 F6 VK_F7 0x76 F7 VK_F8 0x77 F8 VK_F9 0x78 F9 VK_FINAL 0x18 Final VK_HELP 0x2F Help VK_HOME 0x24 Home VK_ICO_00 0xE4 Ico00 * VK_INSERT 0x2D Insert VK_JUNJA 0x17 Junja VK_KANA 0x15 Kana VK_KANJI 0x19 Kanji VK_LAUNCH_APP1 0xB6 App1 VK_LAUNCH_APP2 0xB7 App2 VK_LAUNCH_MAIL 0xB4 Mail VK_LAUNCH_MEDIA_SELECT 0xB5 Media VK_LBUTTON 0x01 Left Button ** VK_LCONTROL 0xA2 Left Ctrl VK_LEFT 0x25 Arrow Left VK_LMENU 0xA4 Left Alt VK_LSHIFT 0xA0 Left Shift VK_LWIN 0x5B Left Win VK_MBUTTON 0x04 Middle Button ** VK_MEDIA_NEXT_TRACK 0xB0 Next Track VK_MEDIA_PLAY_PAUSE 0xB3 Play / Pause VK_MEDIA_PREV_TRACK 0xB1 Previous Track VK_MEDIA_STOP 0xB2 Stop VK_MODECHANGE 0x1F Mode Change VK_NEXT 0x22 Page Down VK_NONCONVERT 0x1D Non Convert VK_NUMLOCK 0x90 Num Lock VK_OEM_FJ_JISHO 0x92 Jisho VK_PAUSE 0x13 Pause VK_PRINT 0x2A Print VK_PRIOR 0x21 Page Up VK_RBUTTON 0x02 Right Button ** VK_RCONTROL 0xA3 Right Ctrl VK_RIGHT 0x27 Arrow Right VK_RMENU 0xA5 Right Alt VK_RSHIFT 0xA1 Right Shift VK_RWIN 0x5C Right Win VK_SCROLL 0x91 Scrol Lock VK_SLEEP 0x5F Sleep VK_SNAPSHOT 0x2C Print Screen VK_UP 0x26 Arrow Up VK_VOLUME_DOWN 0xAE Volume Down VK_VOLUME_MUTE 0xAD Volume Mute VK_VOLUME_UP 0xAF Volume Up VK_XBUTTON1 0x05 X Button 1 ** VK_XBUTTON2 0x06 X Button 2 **

*) VK_ICO_00 virtual code produces '00' (two zeros) when pressed. Windows does not allow mapping of arbitrary Unicode codepoints to this VK code.

**) "mouse button" quasi VK codes are generated by Windows when user clicks left/middle/right/X1/X2 mouse buttons. KbdEdit allows these codes to be assigned to physical keys, but such mappings make no sense: pressing a key with VK_LBUTTON assigned to it will NOT make Windows act as if physical mouse button was pressed.