Here are some useful topics for you to get started on WebCombo.
User Interface Customization
Dynamically Add Item
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Add Columns to WebCombo Add Item in Bound WebCombo Add Item in Unbound WebCombo from Client Side Add Item in Unbound WebCombo from Server Side Add New Item to Web Service Add Rows to WebCombo Adjust Result Box Position Allow AddItem in WebCombo Allow Auto PostBack Allow Navigation on Mouse Wheel Allow Text to Float on the Right Side of WebCombo Allow Text Wrapping to the Next Line Always Show All Rows on Dropdown Combo Always Show Column Headers Always Show Help Button Always Show Result Box Always Show Search Button Apply Load on Demand in WebCombo Apply Predefined Layout in WebCombo Apply Saved Layout in WebCombo Binding Multiple WebCombo Instances to ISDataSource Control Binding WebCombo to AccessDataSource Control Binding WebCombo to a DataSet Binding WebCombo to Custom Object Binding WebCombo to IList DataSource Control Binding WebCombo to ISDataSource Control Binding WebCombo to LinqDataSource Binding WebCombo to ObjectDataSource Control Binding WebCombo to SqlDataSource Control Binding WebCombo to XML-based DataSource Binding WebCombo to XMLDataSource Control Bind WebCombo to Client-side Data Source Clear Selected Row Clear the AdditionalFilter Applied to WebCombo Configure Client Binding Mode using Server Data Source Configure WebCombo to Retrieve Data from ADO Data Service Configure WebCombo to Retrieve Data from WCF Service Configure WebCombo to Retrieve Data from Web Service Configuring Linked WebCombo Create Multiple Columns Unbound WebCombo Using PopulateUnboundData Method Create Unbound WebCombo Using PopulateUnboundData Method Create WebCombo at Runtime Customize Column Types Define Access Key Define Help URL Define Tab Index Define the Action When No Results is Found in WebCombo Define the Help Image Define the Position of Status Bar Define the Result Box's Height and Width Define the Row's Height Define the Search Image Define XHTML Search Image Delete a Row in Unbound WebCombo Determine the Number of Rows First Requested by WebCombo Disable Auto Data Caching Disable Auto Query Handler Disable ViewState in WebCombo Disable WebResources Display Message Box if Unable to Add a Row Display the Result Box to the Right Side of WebCombo Display Tooltip in WebCombo Enable/Disable Animation Enable/Disable WebCombo Enable Animation Enable Default Style for Existing Instance of WebCombo Enable Round Corner in WebCombo.NET 4.0 Enable Sliding Animation in WebCombo Enable Text Floating to the Right Side of the WebCombo Control Enable Wildcard Search Enable XML Compression in WebCombo Enabling AllowWildcardSearch Filter the Data in WebCombo Using SetAdditionalFilter Method Get/Set the TextBox Value Get Specific Row by Its Index Get the Hidden Cell's Value of the Selected Row Get the Number of Rows in WebCombo Get the Selected Row Get the Text and Value of Multiple Selection WebCombo Get the Text of the Selected Row in WebCombo Get the Value of the Selected Row in WebCombo Getting Started with WebCombo 4.0 Using SmartTag Designer Get Total Retrieved Rows in WebCombo Get Total Rows in WebCombo Get WebCombo Instance Handle Data Service Events Hide/Show the Status Box Hide and Show Dropdown Combo Implementing Requery Method Using ISDataSource Implementing Requery Method Using Traditional DataSource Implement Linked WebCombo Functionality Using Column that is not DataTextField or DataValueField as the FilterDataMember Implement WebCombo and RequiedFieldValidator in Web User Control Integrate a WebContextMenu Control to WebCombo Integrate a WebTreeView Control to WebCombo Integrate WebCombo to FormView Integrate WebCombo to GridView Integrate WebCombo to WebGrid Manipulate Data in Rows and Cells Modify the First Cell of the First Row in Unbound WebCombo Navigate to Specific Page After Adding a Row Perform Batch Update in Unbound WebCombo Position Search Box on the Left Preview Layout in WebCombo Re-apply the Styles to Use Updated Predefined Style in Designer Refresh Other Control During Row Addition Refresh WebCombo Save Current Layout in WebCombo Set Combo's Alignment to be Right Displayed Set Default Column Width Set FlyPostBackSettings in WebCombo Set Focus on WebCombo Set Images Directory Set Initial Value from Server Side in WebCombo Set Initial Value of Multiple Selection WebCombo from Client Side Set Initial Value of Multiple Selection WebCombo from Server Side Set Minimum Character Typed to Request the Data Set Result Box Window Type Set ScriptDirectory and SharedScriptDirectory Set Selected Row in Bound WebCombo Set Selected Row in Unbound WebCombo Set the Latency Set the TextBox mode in WebCombo Set the Value of Another Controls in OnAfterItemSelected Client Side Events Set Value at Runtime Show/Hide WebCombo Show Error Message When There is Missing Specification Show the Result Box's Shadow Simulate Inline Text Floating Behavior as in Previous Version Trigger OnTheFlyPost from Client Side Update the Style Definition When Applying the Style Programmatically at Runtime Update the Style Definition when the WebCombo Control is Themed at Application-wide Level (themed using WebStyleManager) Use AdditionalSearchField to Search a Query Text on Other Column Besides DataTextField Column Use AutoComplete Entry Mode Use Bound Multiple Selection WebCombo Use Cached Data on First Load Use Combined Dependencies Linked WebCombo Use Default Entry Mode Use InstantLookUp Entry Mode Use Multiple Columns Mode Use Multiple Dependencies Linked WebCombo Use OnAddItem Client Side Event to Validate Input Use RequiredFieldValidator to Ensure the WebCombo Cannot be Empty Use Round Corner in WebCombo Use SetAdditionalFilter to Filter Data from Server Side Use Single Dependency Linked WebCombo Use Unbound Linked WebCombo Use Unbound Multiple Selection WebCombo Use WebCombo Without Search Button Using Load-on-Demand Data Retrieval with ISDataSource Control in WebCombo Utilize Custom ColumnType Utilize ImageAndText ColumnType Utilize Image ColumnType Utilize Text ColumnType Validate String Only Input In OnKeyDown Client Side Events