VisualStyleInformation.cs source code in C# .NET

                        Code:
                         / FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / WinForms / Managed / System / WinForms / VisualStyles / VisualStyleInformation.cs / 1 / VisualStyleInformation.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

/* 
 */ 
[assembly: System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.MSInternal", "CA905:SystemAndMicrosoftNamespacesRequireApproval", Scope="namespace", Target="System.Windows.Forms.VisualStyles")]
 
namespace System.Windows.Forms.VisualStyles {

    using System;
    using System.Text; 
    using System.Drawing;
    using System.Windows.Forms; 
    using System.Runtime.InteropServices; 
    using System.Diagnostics.CodeAnalysis;
 

    /// 
    /// 
    ///     
    ///         Provides information about the current visual style.
    ///         NOTE: 
    ///         1) These properties (except SupportByOS, which is always meaningful) are meaningful only 
    ///            if visual styles are supported and have currently been applied by the user.
    ///         2) A subset of these use VisualStyleRenderer objects, so they are 
    ///            not meaningful unless VisualStyleRenderer.IsSupported is true.
    ///   
    /// 
    public static class VisualStyleInformation { 

        //Make this per-thread, so that different threads can safely use these methods. 
        [ThreadStatic] 
        private static VisualStyleRenderer visualStyleRenderer = null;
 
        /// 
        /// 
        ///    
        ///       Used to find whether visual styles are supported by the current OS. Same as 
        ///       using the OSFeature class to see if themes are supported.
        ///     
        ///  
        public static bool IsSupportedByOS {
            get { 
                return (OSFeature.Feature.IsPresent(OSFeature.Themes));
            }
        }
 
        /// 
        ///  
        ///     
        ///     Returns true if a visual style has currently been applied by the user, else false.
        ///     
        /// 
        public static bool IsEnabledByUser {
            get {
                if (!IsSupportedByOS) { 
                    return false;
                } 
 
                return (SafeNativeMethods.IsAppThemed());
            } 
        }

        internal static string ThemeFilename {
            get { 
                if (IsEnabledByUser) {
                    StringBuilder filename = new StringBuilder(512); 
                    SafeNativeMethods.GetCurrentThemeName(filename, filename.Capacity, null, 0, null, 0); 
                    return (filename.ToString());
                } 

                return String.Empty;
            }
        } 

        ///  
        ///  
        ///    The current visual style's color scheme name.
        ///  
        public static string ColorScheme {
            get {
                if (IsEnabledByUser) {
                    StringBuilder colorScheme = new StringBuilder(512); 
                    SafeNativeMethods.GetCurrentThemeName(null, 0, colorScheme, colorScheme.Capacity, null, 0);
                    return (colorScheme.ToString()); 
                } 

                return String.Empty; 
            }
        }

        ///  
        /// 
        ///    The current visual style's size name. 
        ///  
        public static string Size {
            get { 
                if (IsEnabledByUser) {
                    StringBuilder size = new StringBuilder(512);
                    SafeNativeMethods.GetCurrentThemeName(null, 0, null, 0, size, size.Capacity);
                    return (size.ToString()); 
                }
 
                return String.Empty; 
            }
        } 

        /// 
        /// 
        ///    The current visual style's display name. 
        /// 
        public static string DisplayName { 
            get { 
                if (IsEnabledByUser) {
                    StringBuilder name = new StringBuilder(512); 
                    SafeNativeMethods.GetThemeDocumentationProperty(ThemeFilename, VisualStyleDocProperty.DisplayName, name, name.Capacity);
                    return name.ToString();
                }
 
                return String.Empty;
            } 
        } 

        ///  
        /// 
        ///    The current visual style's company.
        /// 
        public static string Company { 
            get {
                if (IsEnabledByUser) { 
                    StringBuilder company = new StringBuilder(512); 
                    SafeNativeMethods.GetThemeDocumentationProperty(ThemeFilename, VisualStyleDocProperty.Company, company, company.Capacity);
                    return company.ToString(); 
                }

                return String.Empty;
            } 
        }
 
        ///  
        /// 
        ///    The name of the current visual style's author. 
        /// 
        public static string Author {
            get {
                if (IsEnabledByUser) { 
                    StringBuilder author = new StringBuilder(512);
                    SafeNativeMethods.GetThemeDocumentationProperty(ThemeFilename, VisualStyleDocProperty.Author, author, author.Capacity); 
                    return author.ToString(); 
                }
 
                return String.Empty;
            }
        }
 
        /// 
        ///  
        ///    The current visual style's copyright information. 
        /// 
        public static string Copyright { 
            get {
                if (IsEnabledByUser) {
                    StringBuilder copyright = new StringBuilder(512);
                    SafeNativeMethods.GetThemeDocumentationProperty(ThemeFilename, VisualStyleDocProperty.Copyright, copyright, copyright.Capacity); 
                    return copyright.ToString();
                } 
 
                return String.Empty;
            } 
        }

        /// 
        ///  
        ///    The current visual style's url.
        ///  
        [SuppressMessage("Microsoft.Design", "CA1056:UriPropertiesShouldNotBeStrings")] 
        public static string Url {
            [SuppressMessage("Microsoft.Design", "CA1054:UriParametersShouldNotBeStrings")] 
            get {
                if (IsEnabledByUser) {
                    StringBuilder url = new StringBuilder(512);
                    SafeNativeMethods.GetThemeDocumentationProperty(ThemeFilename, VisualStyleDocProperty.Url, url, url.Capacity); 
                    return url.ToString();
                } 
 
                return String.Empty;
            } 
        }

        /// 
        ///  
        ///    The current visual style's version.
        ///  
        public static string Version { 
            get {
                if (IsEnabledByUser) { 
                    StringBuilder version = new StringBuilder(512);
                    SafeNativeMethods.GetThemeDocumentationProperty(ThemeFilename, VisualStyleDocProperty.Version, version, version.Capacity);
                    return version.ToString();
                } 

                return String.Empty; 
            } 
        }
 
        /// 
        /// 
        ///    The current visual style's description.
        ///  
        public static string Description {
            get { 
                if (IsEnabledByUser) { 
                    StringBuilder description = new StringBuilder(512);
                    SafeNativeMethods.GetThemeDocumentationProperty(ThemeFilename, VisualStyleDocProperty.Description, description, description.Capacity); 
                    return description.ToString();
                }

                return String.Empty; 
            }
        } 
 
        /// 
        ///  
        ///    Returns true if the current theme supports flat menus, else false.
        /// 
        public static bool SupportsFlatMenus {
            get { 
                if (Application.RenderWithVisualStyles) {
                    if (visualStyleRenderer == null) { 
                        visualStyleRenderer = new VisualStyleRenderer(VisualStyleElement.Window.Caption.Active); 
                    }
                    else { 
                        visualStyleRenderer.SetParameters(VisualStyleElement.Window.Caption.Active);
                    }

                    return (SafeNativeMethods.GetThemeSysBool(new HandleRef(null, visualStyleRenderer.Handle), VisualStyleSystemProperty.SupportsFlatMenus)); 
                }
 
                return false; 
            }
        } 

        /// 
        /// 
        ///    The minimum color depth supported by the current visual style. 
        /// 
        public static int MinimumColorDepth { 
            get { 
                if (Application.RenderWithVisualStyles) {
                    if (visualStyleRenderer == null) { 
                        visualStyleRenderer = new VisualStyleRenderer(VisualStyleElement.Window.Caption.Active);
                    }
                    else {
                        visualStyleRenderer.SetParameters(VisualStyleElement.Window.Caption.Active); 
                    }
 
                    int mcDepth = 0; 

                    SafeNativeMethods.GetThemeSysInt(new HandleRef(null, visualStyleRenderer.Handle), VisualStyleSystemProperty.MinimumColorDepth, ref mcDepth); 
                    return mcDepth;
                }

                return 0; 
            }
        } 
 
        /// 
        ///  
        ///    Border Color that Windows XP renders for controls like TextBox and ComboBox.
        /// 
        public static Color TextControlBorder {
            get { 
                if (Application.RenderWithVisualStyles) {
                    if (visualStyleRenderer == null) { 
                        visualStyleRenderer = new VisualStyleRenderer(VisualStyleElement.TextBox.TextEdit.Normal); 
                    }
                    else { 
                        visualStyleRenderer.SetParameters(VisualStyleElement.TextBox.TextEdit.Normal);
                    }
                    Color borderColor = visualStyleRenderer.GetColor(ColorProperty.BorderColor);
                    return borderColor; 
                }
 
                return SystemColors.WindowFrame; 
            }
        } 


        /// 
        ///  
        ///    This is the color buttons and tab pages are highlighted with when they are moused over on themed OS.
        ///  
        public static Color ControlHighlightHot { 
            get {
                if (Application.RenderWithVisualStyles) { 
                    if (visualStyleRenderer == null) {
                        visualStyleRenderer = new VisualStyleRenderer(VisualStyleElement.Button.PushButton.Normal);

                    } 
                    else {
                        visualStyleRenderer.SetParameters(VisualStyleElement.Button.PushButton.Normal); 
                    } 
                    Color accentColor = visualStyleRenderer.GetColor(ColorProperty.AccentColorHint);
                    return accentColor; 
                }

                return SystemColors.ButtonHighlight;
            } 
        }
    } 
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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