## delphi 向Windows窗口发送Alt组合键的问题

PostMessage(hWnd,WM_SYSKEYDOWN,0x41,0);

Sleep(50);

PostMessage(hWnd,WM_SYSKEYUP,0x41,0);

The WM_SYSKEYDOWN message is posted to the window with the keyboard focus when the user holds down the ALT key and then presses another key. It also occurs when no window currently has the keyboard focus; in this case, the WM_SYSKEYDOWN message is sent to the active window. The window that receives the message can distinguish between these two contexts by checking the context code in the lKeyData parameter.

WM_SYSKEYDOWN
nVirtKey = (int) wParam; // virtual-key code
lKeyData = lParam; // key data

Parameters

nVirtKey

Value of wParam. Specifies the virtual-key code of the key being pressed.

lKeyData

Value of lParam. Specifies the repeat count, scan code, extended-key flag, context code, previous key-state flag, and transition-state flag, as shown in the following table:

Value Description
0-15 Specifies the repeat count. The value is the number of times the keystroke is repeated as a result of the user holding down the key.
16-23 Specifies the scan code. The value depends on the original equipment manufacturer (OEM).
24 Specifies whether the key is an extended key, such as the right-hand ALT and CTRL keys that appear on an enhanced 101- or 102-key keyboard. The value is 1 if it is an extended key; otherwise, it is 0.
25-28 Reserved; do not use.
29 Specifies the context code. The value is 1 if the ALT key is down while the key is pressed; it is 0 if the WM_SYSKEYDOWN message is posted to the active window because no window has the keyboard focus.
30 Specifies the previous key state. The value is 1 if the key is down before the message is sent, or it is 0 if the key is up.
31 Specifies the transition state. The value is always 0 for a WM_SYSKEYDOWN message.

The value is 1 if the ALT key is down while the key is pressed;

PostMessage(hWnd,WM_SYSKEYDOWN,0x41,1<<29);

postmessage(edit1.handle,wm_keydown,vk_down,$20000000） Ctrl ：$10000000;
Shift： \$08000000;
Alt:20000000

Delphi键盘按键伪码

if key = chr(VK_RETURN) then...

VK_LBUTTON 01 1 鼠标的左键
VK_RBUTTON 02 2 鼠标的右键
VK-CANCEL 03 3 Contol-break 执行
VK_MBUTTON 04 4 鼠标的中键（三按键鼠标)
VK_BACK 08 8 Backspace键
VK_TAB 09 9 Tab键
VK_CLEAR 0C 12 Clear键
VK_RETURN 0D 13 Enter键
VK_SHIFT 10 16 Shift键
VK_CONTROL 11 17 Ctrl键
VK_PAUSE 13 19 Pause键
VK_CAPITAL 14 20 Caps Lock键
VK_ESCAPE 1B 27 Ese键
VK_SPACE 20 32 Spacebar键
VK_PRIOR 21 33 Page Up键
VK_NEXT 22 34 Page Domw键
VK_END 23 35 End键
VK_HOME 24 36 Home键
VK_LEFT 25 37 LEFT ARROW 键(←)
VK_UP 26 38 UP ARROW键(↑)
VK_RIGHT 27 39 RIGHT ARROW键(→)
VK_DOWN 28 40 DOWN ARROW键(↓)
VK_SELECT 29 41 SELECT键
VK_EXECUTE 2B 43 EXECUTE键
VK_SNAPSHOT 2C 44 Print Screen键
VK_INSERT 2D 45 Ins键
VK_DELETE 2E 46 Del键
VK_HELP 2F 47 Help键
VK_0 30 48 0键
VK_1 31 49 1键
VK_2 32 50 2键
VK_3 33 51 3键
VK_4 34 52 4键
VK_5 35 53 5键
VK_6 36 54 6键
VK_7 37 55 7键
VK_8 38 56 8键
VK_9 39 57 9键
VK_A 41 65 A键
VK_B 42 66 B键
VK_C 43 67 C键
VK_D 44 68 D键
VK_E 45 69 E键
VK_F 46 70 F键
VK_G 47 71 G键
VK_H 48 72 H键
VK_I 49 73 I键
VK_J 4A 74 J键
VK_K 4B 75 K键
VK_L 4C 76 L键
VK_M 4D 77 M键
VK_N 4E 78 N键
VK_O 4F 79 O键
VK_P 50 80 P键
VK_Q 51 81 Q键
VK_R 52 82 R键
VK_S 53 83 S键
VK_T 54 84 T键
VK_U 55 85 U键
VK_V 56 86 V键
VK_W 57 87 W键
VK_X 58 88 X键
VK_Y 59 89 Y键
VK_BZ 5A 90 Z键
VK_MULTIPLY 6A 106 *键
VK_SEPARATOR 6C 108 Separator键
VK_SUBTRACT 6D 109 -键
VK_DECIMAL 6E 110 .键
VK_DIVIDE 6F 111 键
VK_F1 70 112 F1键
VK_F2 71 113 F2键
VK_F3 72 114 F3键
VK_F4 73 115 F4键
VK_F5 74 116 F5键
VK_F6 75 117 F6键
VK_F7 76 118 F7键
VK_F8 77 119 F8键
VK_F9 78 120 F9键
VK_F10 79 121 F10键
VK_F11 7A 122 F11键
VK_F12 7B 123 F12键
VK_NUMLOCK 90 144 Num Lock 键
VK_SCROLL 91 145 Scroll Lock键

posted on 2021-06-23 13:18  癫狂编程  阅读(22)  评论(0编辑  收藏  举报