WinAPI Flooder

#include <windows.h>

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);

VOID CALLBACK FloodTimer( HWND window, UINT Msg, UINT_PTR EventID, DWORD SYSTime);
HWND MenuItems[4];

int WINAPI WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance,
    LPSTR lpCmdLine, int nCmdShow )
{
    MSG  msg ;
    WNDCLASS wc;
    ZeroMemory(&wc, sizeof(wc));

    wc.lpszClassName = TEXT( "Flooder" );
    wc.hInstance     = hInstance ;
    wc.hbrBackground = GetSysColorBrush(COLOR_3DFACE);
    wc.lpfnWndProc   = WndProc ;
    wc.hCursor       = LoadCursor(0, IDC_ARROW);


    RegisterClass(&wc);
    CreateWindow( wc.lpszClassName, TEXT("Flooder"),
        WS_SYSMENU | WS_VISIBLE,
        150, 150, 230, 150, 0, 0, hInstance, 0);

    while( GetMessage(&msg, NULL, 0, 0)) {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
    return (int) msg.wParam;
}

LRESULT CALLBACK WndProc( HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam )
{


    switch(msg)
    {
    case WM_CREATE:
        {
            MenuItems[0] = CreateWindow(TEXT("edit"), TEXT("Текст..."),
                WS_VISIBLE | WS_CHILD | WS_BORDER,
                0, 0, 225, 25,
                hwnd, (HMENU) 1, NULL, NULL);

            MenuItems[1] = CreateWindow(TEXT("button"), TEXT("Флудить!"),
                WS_VISIBLE | WS_CHILD ,
                120, 50, 80, 25,
                hwnd, (HMENU) 2, NULL, NULL);

            MenuItems[2] = CreateWindow(TEXT("edit"), TEXT("100"),
                WS_VISIBLE | WS_CHILD | WS_BORDER,
                25, 50, 80, 25,
                hwnd, (HMENU) 3, NULL, NULL);

            MenuItems[3] = CreateWindow(TEXT("button"), TEXT("Стоп"),
                WS_VISIBLE | WS_CHILD ,
                120, 75, 80, 25,
                hwnd, (HMENU) 4, NULL, NULL);
            break;
        }

    case WM_COMMAND:
        {
            if(HIWORD(wParam) == BN_CLICKED){
                if (LOWORD(wParam) == 2) {
                    KillTimer(hwnd, 1);
                    TCHAR speed[16];
                    GetWindowText(MenuItems[2], speed, sizeof(speed));
                    SetTimer(hwnd, 1, _wtoi(speed), FloodTimer);
                } else if(LOWORD(wParam) == 4)
                {
                    KillTimer(hwnd, 1);
                }
            }
            break;
        }
    case WM_DESTROY:
        {
            KillTimer(hwnd, 1);
            PostQuitMessage(0);
            break;
        }
    }
    return DefWindowProc(hwnd, msg, wParam, lParam);
}

VOID CALLBACK FloodTimer( HWND window, UINT Msg, UINT_PTR EventID, DWORD SYSTime)
{
    TCHAR* buff = (TCHAR*)calloc(1024, sizeof(TCHAR));
    GetWindowText(MenuItems[0], buff, 1024);

    KEYBDINPUT KbInput;
    ZeroMemory(&KbInput, sizeof(KEYBDINPUT));
    INPUT Input;
    ZeroMemory(&Input, sizeof(INPUT));
    TCHAR* ch = buff;

    while(*ch)
    {
        KbInput.wScan = *ch;
        KbInput.dwFlags = KEYEVENTF_UNICODE;
        Input.type = INPUT_KEYBOARD;
        Input.ki = KbInput;
        SendInput(1,&Input,sizeof(Input));

        KbInput.wScan = *(ch++);
        KbInput.dwFlags = KEYEVENTF_UNICODE | KEYEVENTF_KEYUP;
        Input.type = INPUT_KEYBOARD;
        Input.ki = KbInput;
        SendInput(1,&Input,sizeof(Input));
    }

    keybd_event(VK_RETURN, NULL, KEYEVENTF_EXTENDEDKEY, NULL);
    keybd_event(VK_RETURN, NULL, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, NULL);

    free(buff);
}