963561: Added sample code for checkmark and radio button colors in PDF document

Forms/Customize-indicator-colors/.NET/Customize-indicator-colors.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.14.36221.1 d17.14
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Customize-indicator-colors", "Customize-indicator-colors\Customize-indicator-colors.csproj", "{D5A2EFE1-DF64-41CA-9A25-A1A2EECA37EA}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{D5A2EFE1-DF64-41CA-9A25-A1A2EECA37EA}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{D5A2EFE1-DF64-41CA-9A25-A1A2EECA37EA}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{D5A2EFE1-DF64-41CA-9A25-A1A2EECA37EA}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{D5A2EFE1-DF64-41CA-9A25-A1A2EECA37EA}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {89B8EE92-DFEA-4816-A09F-0612E45354F5}
+	EndGlobalSection
+EndGlobal

Forms/Customize-indicator-colors/.NET/Customize-indicator-colors/Customize-indicator-colors.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <RootNamespace>Customize_indicator_colors</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Syncfusion.Pdf.Net.Core" Version="*" />
+  </ItemGroup>
+
+</Project>

Forms/Customize-indicator-colors/.NET/Customize-indicator-colors/Program.cs

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+using Syncfusion.Drawing;
+using Syncfusion.Pdf.Parsing;
+
+// Open the input PDF file stream.
+using (FileStream fileStream = new FileStream(Path.GetFullPath(@"Data/Input.pdf"), FileMode.Open, FileAccess.Read))
+{
+    // Load the PDF document from the input stream.
+    PdfLoadedDocument loadedDocument = new PdfLoadedDocument(fileStream);
+
+    // Access the existing form fields in the PDF.
+    PdfLoadedForm form = loadedDocument.Form;
+
+    // Iterate through all form fields to find checkboxes and radio button lists.
+    foreach (PdfLoadedField field in form.Fields)
+    {
+        // If the field is a checkbox, change its checkmark color using ForeColor.
+        if (field is PdfLoadedCheckBoxField checkBoxField)
+        {
+            checkBoxField.ForeColor = Color.Red; // Set desired checkbox color.
+        }
+        // If the field is a radio button list, change each item's dot color.
+        else if (field is PdfLoadedRadioButtonListField radioButtonField)
+        {
+            foreach (PdfLoadedRadioButtonItem item in radioButtonField.Items)
+            {
+                item.ForeColor = Color.Blue; // Set desired radio button color.
+            }
+        }
+    }
+    // Disable the default appearance to allow custom rendering of form fields.
+    form.SetDefaultAppearance(false);
+    // Create the output file stream.
+    using (FileStream outputFileStream = new FileStream(Path.GetFullPath(@"Output/Output.pdf"), FileMode.Create, FileAccess.ReadWrite))
+    {
+        // Save the modified PDF document to the new file stream.
+        loadedDocument.Save(outputFileStream);
+    }
+
+    // Close the PDF document.
+    loadedDocument.Close(true);
+}