List of GetLayeredWindowAttributes() Examples

Examples of GetLayeredWindowAttributes()

com.sun.jna.examples.win32.User32.GetLayeredWindowAttributes()
com.sun.jna.platform.win32.User32.GetLayeredWindowAttributes()
The GetLayeredWindowAttributes function retrieves the opacity and transparency color key of a layered window. @param hwnd Handle to the layered window. A layered window is created by specifying WS_EX_LAYERED when creating the window with the CreateWindowEx function or by setting WS_EX_LAYERED via SetWindowLong after the window has been created. @param pcrKey Pointer to a COLORREF value that receives the transparency color key to be used when composing the layered window. All pixels painted by the window in this color will be transparent. This can be NULL if the argument is not needed. @param pbAlpha Pointer to a BYTE that receives the Alpha value used to describe the opacity of the layered window. Similar to the SourceConstantAlpha member of the BLENDFUNCTION structure. When the variable referred to by pbAlpha is 0, the window is completely transparent. When the variable referred to by pbAlpha is 255, the window is opaque. This can be NULL if the argument is not needed. @param pdwFlags Pointer to a DWORD that receives a layering flag. This can be NULL if the argument is not needed. @return If the function succeeds, the return value is nonzero. If thefunction fails, the return value is zero. To get extended error information, call GetLastError.

Examples of com.sun.jna.examples.win32.User32.GetLayeredWindowAttributes()

                    HWND hWnd = getHWnd(win);
                    // extract current constant alpha setting, if possible
                    ByteByReference bref = new ByteByReference();
                    IntByReference iref = new IntByReference();
                    byte level = getAlpha(win);
                    if (user.GetLayeredWindowAttributes(hWnd, null, bref, iref)
                        && (iref.getValue() & User32.LWA_ALPHA) != 0) {
                        level = bref.getValue();
                    }
                    blend.SourceConstantAlpha = level;
                    blend.AlphaFormat = User32.AC_SRC_ALPHA;

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Examples of com.sun.jna.examples.win32.User32.GetLayeredWindowAttributes()

                    ByteByReference bref = new ByteByReference();
                    IntByReference iref = new IntByReference();
                    byte level = getAlpha(win);
                    try {
                        // GetLayeredwindowAttributes supported WinXP and later
                        if (user.GetLayeredWindowAttributes(hWnd, null, bref, iref)
                            && (iref.getValue() & User32.LWA_ALPHA) != 0) {
                            level = bref.getValue();
                        }
                    }
                    catch(UnsatisfiedLinkError e) {

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Examples of com.sun.jna.examples.win32.User32.GetLayeredWindowAttributes()

                    ByteByReference bref = new ByteByReference();
                    IntByReference iref = new IntByReference();
                    byte level = getAlpha(win);
                    try {
                        // GetLayeredwindowAttributes supported WinXP and later
                        if (user.GetLayeredWindowAttributes(hWnd, null, bref, iref)
                            && (iref.getValue() & User32.LWA_ALPHA) != 0) {
                            level = bref.getValue();
                        }
                    }
                    catch(UnsatisfiedLinkError e) {

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Examples of com.sun.jna.platform.win32.User32.GetLayeredWindowAttributes()

                    ByteByReference bref = new ByteByReference();
                    IntByReference iref = new IntByReference();
                    byte level = getAlpha(win);
                    try {
                        // GetLayeredwindowAttributes supported WinXP and later
                        if (user.GetLayeredWindowAttributes(hWnd, null, bref, iref)
                            && (iref.getValue() & WinUser.LWA_ALPHA) != 0) {
                            level = bref.getValue();
                        }
                    }
                    catch(UnsatisfiedLinkError e) {

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Examples of com.sun.jna.platform.win32.User32.GetLayeredWindowAttributes()

                    ByteByReference bref = new ByteByReference();
                    IntByReference iref = new IntByReference();
                    byte level = getAlpha(win);
                    try {
                        // GetLayeredwindowAttributes supported WinXP and later
                        if (user.GetLayeredWindowAttributes(hWnd, null, bref, iref)
                            && (iref.getValue() & WinUser.LWA_ALPHA) != 0) {
                            level = bref.getValue();
                        }
                    }
                    catch(UnsatisfiedLinkError e) {

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