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ShowScrollBar Function
    
    
    
    
        
     
            
      
using System.Runtime.InteropServices;
        
     
        
        
     
            
      
[DllImport("user32.dll")]private static extern int GetWindowLong(IntPtr hwnd, int nIndex);
        
     
        
        
     
            
      
/// 判断是否出现垂直滚动条        /// 待测控件        /// 
       
        出现垂直滚动条返回true，否则为false
       
public static bool IsVerticalScrollBarVisible(Control ctrl)
{
    if (!ctrl.IsHandleCreated) return false;
    return (GetWindowLong(ctrl.Handle, GWL_STYLE) & WS_VSCROLL) != 0;
}
        
     
        
        
     
            
      
/// 判断是否出现水平滚动条        /// 待测控件        /// 
       
        出现水平滚动条返回true，否则为false
       
public static bool IsHorizontalScrollBarVisible(Control ctrl)
{
    if (!ctrl.IsHandleCreated) return false;
    return (GetWindowLong(ctrl.Handle, GWL_STYLE) & WS_HSCROLL) != 0;
}
        
     
        
        
     
            
      
/** Scroll Bar Constants*/
public const int SB_HORZ = 0;
public const int SB_VERT = 1;
public const int SB_CTL = 2;
public const int SB_BOTH = 3;
/* ShowWindow() Commands*/
public const int SW_HIDE = 0;
public const int SW_SHOW = 5;
private void button1_Click(object sender, EventArgs e)
{
    ShowScrollBar(listView1.Handle, SB_VERT, false);
}
        
     
        
        
     
            
      
转载于: CNBlog