Styling the indeterminate state of a WPF checkbox

Question

I want to style the indeterminate state of a WPF checkbox. We have a treeview control with checkboxes, and we want the indeterminate state to represent that some descendants are

Answer 1

The below code is a sample check box with three state.

    

    

    

    

    
        
            
                
                
            
        
    

    
        
            
                
                
            
        
    

    
        
            
                
                
            
        
    

    
        
            
                
                
            
        
    

    
        
            
                
                
            
        
    

    
        
            
                
                
                
                
            
        
    

    

    

    

    

    

    
        
            
                
                
            
        
    

    
        
            
                
                
            
        
    

    
        
            
                
                
            
        
    

    
        
            
                
                
            
        
    

    

    

    

    
    

    
    


    
    Hello
        asdfsdaf
        

The best software to modify the existing look and feel of the controls is Expression Blend. If you want to change the existing look and feel and you have to modify the Control Template of the control.