User32 Interface

import com.sun.jna.Native;
import com.sun.jna.Pointer;
import com.sun.jna.Structure;
import com.sun.jna.platform.win32.WinDef.RECT;
import com.sun.jna.ptr.ByteByReference;
import com.sun.jna.ptr.IntByReference;
import com.sun.jna.win32.StdCallLibrary.StdCallCallback;
import com.sun.jna.win32.W32APIOptions;

public interface User32 extends W32APIOptions {
    User32 INSTANCE = (User32) Native.loadLibrary("user32", User32.class, DEFAULT_OPTIONS);
    Pointer GetDC(Pointer hWnd);
    int ReleaseDC(Pointer hWnd, Pointer hDC);
    int FLASHW_STOP = 0;
    int FLASHW_CAPTION = 1;
    int FLASHW_TRAY = 2;
    int FLASHW_ALL = (FLASHW_CAPTION | FLASHW_TRAY);
    int FLASHW_TIMER = 4;
    int FLASHW_TIMERNOFG = 12;
    public static class FLASHWINFO extends Structure {
        public int cbSize;
        public Pointer hWnd;
        public int dwFlags;
        public int uCount;
        public int dwTimeout;
    }
    int IMAGE_BITMAP = 0;
    int IMAGE_ICON = 1;
    int IMAGE_CURSOR = 2;
    int IMAGE_ENHMETAFILE = 3;
    int LR_DEFAULTCOLOR = 0x0000;
    int LR_MONOCHROME = 0x0001;
    int LR_COLOR = 0x0002;
    int LR_COPYRETURNORG = 0x0004;
    int LR_COPYDELETEORG = 0x0008;
    int LR_LOADFROMFILE = 0x0010;
    int LR_LOADTRANSPARENT = 0x0020;
    int LR_DEFAULTSIZE = 0x0040;
    int LR_VGACOLOR = 0x0080;
    int LR_LOADMAP3DCOLORS = 0x1000;
    int LR_CREATEDIBSECTION = 0x2000;
    int LR_COPYFROMRESOURCE = 0x4000;
    int LR_SHARED = 0x8000;
    Pointer FindWindowA(String winClass, String title);
    int GetClassName(Pointer hWnd, byte[] lpClassName, int nMaxCount);
    public static class GUITHREADINFO extends Structure {
        public int cbSize = size();
        public int flags;
        Pointer hwndActive;
        Pointer hwndFocus;
        Pointer hwndCapture;
        Pointer hwndMenuOwner;
        Pointer hwndMoveSize;
        Pointer hwndCaret;
        RECT rcCaret;
    }
    boolean GetGUIThreadInfo(int idThread, GUITHREADINFO lpgui);
    public static class WINDOWINFO extends Structure {
        public int cbSize = size();
        public RECT rcWindow;
        public RECT rcClient;
        public int dwStyle;
        public int dwExStyle;
        public int dwWindowStatus;
        public int cxWindowBorders;
        public int cyWindowBorders;
        public short atomWindowType;
        public short wCreatorVersion;
    }
    boolean GetWindowInfo(Pointer hWnd, WINDOWINFO pwi);
    boolean GetWindowRect(Pointer hWnd, RECT rect);
    int GetWindowText(Pointer hWnd, byte[] lpString, int nMaxCount);
    int GetWindowTextLength(Pointer hWnd);
    int GetWindowModuleFileName(Pointer hWnd, byte[] lpszFileName, int cchFileNameMax);
    int GetWindowThreadProcessId(Pointer hWnd, IntByReference lpdwProcessId);
    interface WNDENUMPROC extends StdCallCallback {
        /**
         * Return whether to continue enumeration.
         */
        boolean callback(Pointer hWnd, Pointer data);
    }
    boolean EnumWindows(WNDENUMPROC lpEnumFunc, Pointer data);
    boolean EnumThreadWindows(int dwThreadId, WNDENUMPROC lpEnumFunc, Pointer data);
    boolean FlashWindowEx(FLASHWINFO info);
    Pointer LoadIcon(Pointer hInstance, String iconName);
    Pointer LoadImage(Pointer hinst, // handle to instance
            String name, // image to load
            int type, // image type
            int xDesired, // desired width
            int yDesired, // desired height
            int load // load options
            );
    boolean DestroyIcon(Pointer hicon);
    int GWL_EXSTYLE = -20;
    int GWL_STYLE = -16;
    int GWL_WNDPROC = -4;
    int GWL_HINSTANCE = -6;
    int GWL_ID = -12;
    int GWL_USERDATA = -21;
    int DWL_DLGPROC = 4;
    int DWL_MSGRESULT = 0;
    int DWL_USER = 8;
    int WS_EX_COMPOSITED = 0x20000000;
    int WS_EX_LAYERED = 0x80000;
    int WS_EX_TRANSPARENT = 32;
    int GetWindowLong(Pointer hWnd, int nIndex);
    int SetWindowLong(Pointer hWnd, int nIndex, int dwNewLong);
    int LWA_COLORKEY = 1;
    int LWA_ALPHA = 2;
    int ULW_COLORKEY = 1;
    int ULW_ALPHA = 2;
    int ULW_OPAQUE = 4;
    boolean SetLayeredWindowAttributes(Pointer hwnd, int crKey,
            byte bAlpha, int dwFlags);
    boolean GetLayeredWindowAttributes(Pointer hwnd,
            IntByReference pcrKey,
            ByteByReference pbAlpha,
            IntByReference pdwFlags);
    /**
     * Defines the x- and y-coordinates of a point.
     */
    public static class POINT extends Structure {
        public int x, y;
    }
    /**
     * Specifies the width and height of a rectangle.
     */
    public static class SIZE extends Structure {
        public int cx, cy;
    }
    int AC_SRC_OVER = 0x00;
    int AC_SRC_ALPHA = 0x01;
    int AC_SRC_NO_PREMULT_ALPHA = 0x01;
    int AC_SRC_NO_ALPHA = 0x02;
    public static class BLENDFUNCTION extends Structure {
        public byte BlendOp = AC_SRC_OVER; // only valid value
        public byte BlendFlags = 0; // only valid value
        public byte SourceConstantAlpha;
        public byte AlphaFormat;
    }
    boolean UpdateLayeredWindow(Pointer hwnd, Pointer hdcDst,
            POINT pptDst, SIZE psize,
            Pointer hdcSrc, POINT pptSrc, int crKey,
            BLENDFUNCTION pblend, int dwFlags);
    int SetWindowRgn(Pointer hWnd, Pointer hRgn, boolean bRedraw);
    int VK_SHIFT = 16;
    int VK_LSHIFT = 0xA0;
    int VK_RSHIFT = 0xA1;
    int VK_CONTROL = 17;
    int VK_LCONTROL = 0xA2;
    int VK_RCONTROL = 0xA3;
    int VK_MENU = 18;
    int VK_LMENU = 0xA4;
    int VK_RMENU = 0xA5;
    boolean GetKeyboardState(byte[] state);
    short GetAsyncKeyState(int vKey);
}