java.lang.Object
- com.formdev.flatlaf.ui.FlatNativeWindowsLibrary

```
public class FlatNativeWindowsLibrary
extends Object
```
Native methods for Windows.
Note: This is private API. Do not use!

Since:

3.1

Field Summary

Fields
Modifier and Type	Field	Description
`static Color`	`COLOR_NONE`
`static int`	`DWMWA_BORDER_COLOR`	DWMWINDOWATTRIBUTE see https://learn.microsoft.com/en-us/windows/win32/api/dwmapi/ne-dwmapi-dwmwindowattribute
`static int`	`DWMWA_CAPTION_COLOR`	DWMWINDOWATTRIBUTE see https://learn.microsoft.com/en-us/windows/win32/api/dwmapi/ne-dwmapi-dwmwindowattribute
`static int`	`DWMWA_COLOR_DEFAULT`
`static int`	`DWMWA_COLOR_NONE`
`static int`	`DWMWA_TEXT_COLOR`	DWMWINDOWATTRIBUTE see https://learn.microsoft.com/en-us/windows/win32/api/dwmapi/ne-dwmapi-dwmwindowattribute
`static int`	`DWMWA_USE_IMMERSIVE_DARK_MODE`	DWMWINDOWATTRIBUTE see https://learn.microsoft.com/en-us/windows/win32/api/dwmapi/ne-dwmapi-dwmwindowattribute
`static int`	`DWMWCP_DEFAULT`	DWM_WINDOW_CORNER_PREFERENCE see https://learn.microsoft.com/en-us/windows/win32/api/dwmapi/ne-dwmapi-dwm_window_corner_preference
`static int`	`DWMWCP_DONOTROUND`	DWM_WINDOW_CORNER_PREFERENCE see https://learn.microsoft.com/en-us/windows/win32/api/dwmapi/ne-dwmapi-dwm_window_corner_preference
`static int`	`DWMWCP_ROUND`	DWM_WINDOW_CORNER_PREFERENCE see https://learn.microsoft.com/en-us/windows/win32/api/dwmapi/ne-dwmapi-dwm_window_corner_preference
`static int`	`DWMWCP_ROUNDSMALL`	DWM_WINDOW_CORNER_PREFERENCE see https://learn.microsoft.com/en-us/windows/win32/api/dwmapi/ne-dwmapi-dwm_window_corner_preference

Constructor Summary

Constructors
Constructor Description

FlatNativeWindowsLibrary()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static boolean`	`dwmSetWindowAttributeBOOL(long hwnd, int attribute, boolean value)`	Invokes Win32 API method `DwmSetWindowAttribute()` with a `BOOL` attribute value.
`static boolean`	`dwmSetWindowAttributeCOLORREF(long hwnd, int attribute, Color color)`	Invokes Win32 API method `DwmSetWindowAttribute()` with a `COLORREF` attribute value.
`static boolean`	`dwmSetWindowAttributeDWORD(long hwnd, int attribute, int value)`	Invokes Win32 API method `DwmSetWindowAttribute()` with a `DWORD` attribute value.
`static long`	`getHWND(Window window)`	Gets the Windows window handle (HWND) for the given Swing window.
`static long`	`getOSBuildNumber()`	Gets the Windows operating system build number.
`static boolean`	`isLoaded()`	Checks whether native library is loaded/available.
`static boolean`	`setWindowCornerPreference(long hwnd, int cornerPreference)`	Sets the rounded corner preference for the window.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - DWMWCP_DEFAULT
```
public static final int DWMWCP_DEFAULT
```
    DWM_WINDOW_CORNER_PREFERENCE see https://learn.microsoft.com/en-us/windows/win32/api/dwmapi/ne-dwmapi-dwm_window_corner_preference
    
    See Also:
    
    Constant Field Values
  - DWMWCP_DONOTROUND
```
public static final int DWMWCP_DONOTROUND
```
    DWM_WINDOW_CORNER_PREFERENCE see https://learn.microsoft.com/en-us/windows/win32/api/dwmapi/ne-dwmapi-dwm_window_corner_preference
    
    See Also:
    
    Constant Field Values
  - DWMWCP_ROUND
```
public static final int DWMWCP_ROUND
```
    DWM_WINDOW_CORNER_PREFERENCE see https://learn.microsoft.com/en-us/windows/win32/api/dwmapi/ne-dwmapi-dwm_window_corner_preference
    
    See Also:
    
    Constant Field Values
  - DWMWCP_ROUNDSMALL
```
public static final int DWMWCP_ROUNDSMALL
```
    DWM_WINDOW_CORNER_PREFERENCE see https://learn.microsoft.com/en-us/windows/win32/api/dwmapi/ne-dwmapi-dwm_window_corner_preference
    
    See Also:
    
    Constant Field Values
  - DWMWA_USE_IMMERSIVE_DARK_MODE
```
public static final int DWMWA_USE_IMMERSIVE_DARK_MODE
```
    DWMWINDOWATTRIBUTE see https://learn.microsoft.com/en-us/windows/win32/api/dwmapi/ne-dwmapi-dwmwindowattribute
    
    Since:
    
    3.3
    
    See Also:
    
    Constant Field Values
  - DWMWA_BORDER_COLOR
```
public static final int DWMWA_BORDER_COLOR
```
    DWMWINDOWATTRIBUTE see https://learn.microsoft.com/en-us/windows/win32/api/dwmapi/ne-dwmapi-dwmwindowattribute
    
    Since:
    
    3.3
    
    See Also:
    
    Constant Field Values
  - DWMWA_CAPTION_COLOR
```
public static final int DWMWA_CAPTION_COLOR
```
    DWMWINDOWATTRIBUTE see https://learn.microsoft.com/en-us/windows/win32/api/dwmapi/ne-dwmapi-dwmwindowattribute
    
    Since:
    
    3.3
    
    See Also:
    
    Constant Field Values
  - DWMWA_TEXT_COLOR
```
public static final int DWMWA_TEXT_COLOR
```
    DWMWINDOWATTRIBUTE see https://learn.microsoft.com/en-us/windows/win32/api/dwmapi/ne-dwmapi-dwmwindowattribute
    
    Since:
    
    3.3
    
    See Also:
    
    Constant Field Values
  - DWMWA_COLOR_DEFAULT
```
public static final int DWMWA_COLOR_DEFAULT
```
    Since:
    
    3.3
    
    See Also:
    
    Constant Field Values
  - DWMWA_COLOR_NONE
```
public static final int DWMWA_COLOR_NONE
```
    Since:
    
    3.3
    
    See Also:
    
    Constant Field Values
  - COLOR_NONE
```
public static final Color COLOR_NONE
```
    Since:
    
    3.3
- Constructor Detail
  - FlatNativeWindowsLibrary
```
public FlatNativeWindowsLibrary()
```
- Method Detail
  - isLoaded
```
public static boolean isLoaded()
```
    Checks whether native library is loaded/available.
    Note: It is required to invoke this method before invoking any other method of this class. Otherwise, the native library may not be loaded.
  - getOSBuildNumber
```
public static long getOSBuildNumber()
```
    Gets the Windows operating system build number.
    Invokes Win32 API method GetVersionEx() and returns OSVERSIONINFO.dwBuildNumber. See https://learn.microsoft.com/en-us/windows/win32/api/sysinfoapi/nf-sysinfoapi-getversionexa
  - getHWND
```
public static long getHWND(Window window)
```
    Gets the Windows window handle (HWND) for the given Swing window.
    Note that the underlying Windows window must be already created, otherwise this method returns zero. Use following to ensure this:
    if( !window.isDisplayable() ) window.addNotify();
    or invoke this method after packing the window. E.g.
    window.pack(); long hwnd = getHWND( window );
  - setWindowCornerPreference
```
public static boolean setWindowCornerPreference(long hwnd,
                                                int cornerPreference)
```
    Sets the rounded corner preference for the window. Allowed values are DWMWCP_DEFAULT, DWMWCP_DONOTROUND, DWMWCP_ROUND and DWMWCP_ROUNDSMALL.
    Invokes Win32 API method DwmSetWindowAttribute(DWMWA_WINDOW_CORNER_PREFERENCE). See https://learn.microsoft.com/en-us/windows/win32/api/dwmapi/nf-dwmapi-dwmsetwindowattribute
    Supported since Windows 11 Build 22000.
  - dwmSetWindowAttributeBOOL
```
public static boolean dwmSetWindowAttributeBOOL(long hwnd,
                                                int attribute,
                                                boolean value)
```
    Invokes Win32 API method DwmSetWindowAttribute() with a BOOL attribute value. See https://learn.microsoft.com/en-us/windows/win32/api/dwmapi/nf-dwmapi-dwmsetwindowattribute
    
    Since:
    
    3.3
  - dwmSetWindowAttributeDWORD
```
public static boolean dwmSetWindowAttributeDWORD(long hwnd,
                                                 int attribute,
                                                 int value)
```
    Invokes Win32 API method DwmSetWindowAttribute() with a DWORD attribute value. See https://learn.microsoft.com/en-us/windows/win32/api/dwmapi/nf-dwmapi-dwmsetwindowattribute
    
    Since:
    
    3.3
  - dwmSetWindowAttributeCOLORREF
```
public static boolean dwmSetWindowAttributeCOLORREF(long hwnd,
                                                    int attribute,
                                                    Color color)
```
    Invokes Win32 API method DwmSetWindowAttribute() with a COLORREF attribute value. See https://learn.microsoft.com/en-us/windows/win32/api/dwmapi/nf-dwmapi-dwmsetwindowattribute
    Supported since Windows 11 Build 22000.
    
    Since:
    
    3.3

Class FlatNativeWindowsLibrary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

DWMWCP_DEFAULT

DWMWCP_DONOTROUND

DWMWCP_ROUND

DWMWCP_ROUNDSMALL

DWMWA_USE_IMMERSIVE_DARK_MODE

DWMWA_BORDER_COLOR

DWMWA_CAPTION_COLOR

DWMWA_TEXT_COLOR

DWMWA_COLOR_DEFAULT

DWMWA_COLOR_NONE

COLOR_NONE

Constructor Detail

FlatNativeWindowsLibrary

Method Detail

isLoaded

getOSBuildNumber

getHWND

setWindowCornerPreference

dwmSetWindowAttributeBOOL

dwmSetWindowAttributeDWORD

dwmSetWindowAttributeCOLORREF