C/C++ - WinAPI | WinWaitActive() & Send()

[whoa2k]

Any idea how to implement these two AutoIt functions in C/C++ ?

[matwachich]

For the first: a loop, GetForegroundWindow, GetWindowText, StrStr

The second: SendInput

PS: => MSDN

[funkey]

Hello,
I just build a function similar to AutoIt's Send() function. To keep it more easy I just made a second function named SendVK() t send virtual key codes. Maybe someone likes it!
 

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#include <Windows.h>
#include <tchar.h>
#include <string>

#ifdef _UNICODE
#    define tstring std::wstring
#else
#    define tstring std::string
#endif

void Send(const TCHAR *CharacterString, HWND hKeepActive)
{
    TCHAR cChar, FiLoBuffer[32];
    INPUT Input = { 0 };
    KEYBDINPUT kb = { 0 };
    int iModifiers = 0;
    int iUpDown = 0;
    BOOL bNoMoreModifier;

    cChar = *CharacterString;
    BlockInput(TRUE);
    while ((cChar))
    {
        if (hKeepActive != NULL)
        {
            if (IsIconic(hKeepActive)) ShowWindow(hKeepActive, SW_RESTORE);
            if (hKeepActive != GetForegroundWindow()) SetForegroundWindow(hKeepActive);
        }
        ZeroMemory(&kb, sizeof(KEYBDINPUT));
        bNoMoreModifier = FALSE;
        switch (cChar)
        {
        case '!':
            kb.wVk = VK_MENU;
            FiLoBuffer[iModifiers++] = VK_MENU;
            break;
        case '+':
            kb.wVk = VK_SHIFT;
            FiLoBuffer[iModifiers++] = VK_SHIFT;
            break;
        case '^':
            kb.wVk = VK_CONTROL;
            FiLoBuffer[iModifiers++] = VK_CONTROL;
            break;
        case '#':
            kb.wVk = VK_RWIN;
            FiLoBuffer[iModifiers++] = VK_RWIN;
            break;
        default:
            bNoMoreModifier = TRUE;
            break;
        }

        if ((iModifiers > 0) && bNoMoreModifier)    //First char after modifierer
        {
            if ((cChar > 0x60) && (cChar < 0x7b))
                kb.wVk = cChar - 0x20;
            else
                kb.wVk = cChar;

            kb.wScan = 0;
        }
        else if (iModifiers > 0)
        {
            kb.wScan = 0;
        }
        else
        {
            kb.wVk = 0;
            kb.wScan = cChar;
        }
        kb.dwFlags = KEYEVENTF_UNICODE;
        Input.type = INPUT_KEYBOARD;
        Input.ki = kb;
        SendInput(1, &Input, sizeof(Input));

        if ((iModifiers == 0) || (bNoMoreModifier))
        {
            if (iModifiers != 0)
            {
                if ((cChar > 0x60) && (cChar < 0x7b))
                    kb.wVk = cChar - 0x20;
                else
                    kb.wVk = cChar;
                kb.wScan = 0;
            }
            else
            {
                kb.wVk = 0;
                kb.wScan = cChar;
            }
            kb.dwFlags = KEYEVENTF_UNICODE | KEYEVENTF_KEYUP;
            Input.type = INPUT_KEYBOARD;
            Input.ki = kb;
            SendInput(1, &Input, sizeof(Input));
        }

        if ((bNoMoreModifier || (CharacterString[1] == NULL)) && (iModifiers > 0))
        {
            for (int i = iModifiers - 1; i >= 0; i--)
            {
                kb.wVk = FiLoBuffer[i];
                kb.wScan = 0;
                kb.dwFlags = KEYEVENTF_UNICODE | KEYEVENTF_KEYUP;
                Input.type = INPUT_KEYBOARD;
                Input.ki = kb;
                SendInput(1, &Input, sizeof(Input));
                FiLoBuffer[i] = 0;
            }
            iModifiers = 0;
        }

        cChar = *++CharacterString;
    }
    BlockInput(FALSE);
}

/*        0 = down & up, 1 = down , 2 = up        */
void SendVK(WORD vk, HWND hKeepActive, int iUpDown)
{
    INPUT Input = { 0 };
    KEYBDINPUT kb = { 0 };

    if (hKeepActive != NULL)
    {
        if (IsIconic(hKeepActive)) ShowWindow(hKeepActive, SW_RESTORE);
        if (hKeepActive != GetForegroundWindow()) SetForegroundWindow(hKeepActive);
    }

    if ((iUpDown == 0) || (iUpDown == 1))
    {
        kb.wVk = vk;
        kb.wScan = 0;
        kb.dwFlags = KEYEVENTF_UNICODE;
        Input.type = INPUT_KEYBOARD;
        Input.ki = kb;
        SendInput(1, &Input, sizeof(Input));
    }

    if ((iUpDown == 0) || (iUpDown == 2))
    {
        kb.wVk = vk;
        kb.wScan = 0;
        kb.dwFlags = KEYEVENTF_UNICODE | KEYEVENTF_KEYUP;
        Input.type = INPUT_KEYBOARD;
        Input.ki = kb;
        SendInput(1, &Input, sizeof(Input));
    }
}

//int _tmain(int, char**)
int APIENTRY _tWinMain(HINSTANCE, HINSTANCE, LPTSTR, int)
{
    HWND hNotepad = FindWindow(_T("Notepad"), NULL);
    if (hNotepad == NULL)
    {
        MessageBox(NULL, _T("Please open notepad!"), _T("Information"),
            MB_ICONINFORMATION);
        return 0;
    }

    Sleep(500);

    Send(_T("Hello\nmy\tfriends+1^a"), hNotepad);
    Sleep(2000);

    SendVK(VK_END, hNotepad, 0);
    SendVK(VkKeyScan('^'), hNotepad, 0);
    SendVK(VkKeyScan('#'), hNotepad, 0);
    SendVK(VkKeyScan('+'), hNotepad, 0);

    Send(_T("#r"), NULL);

    Sleep(500);
    SendVK(VK_F4, NULL, 0);
    SendVK(VK_DOWN, NULL, 0);

    return 0;
}

[LarryDalooza]

AutoIt also gets around Windows enforcement of a process not "stealing" focus from the foreground window in it's "WinActivate" functionality. That nuance is an example of other things that AutoIt does that are not just straight ports of Windows API.