.

        public const int ERROR_INVALID_LB_MESSAGE = 1432;

.

        /// LB_SETCOUNT sent to non-lazy list box.

.

        public const int ERROR_LB_WITHOUT_TABSTOPS = 1434;

.

WM_DELETEITEM

0x2D

Sent to the owner of a list box or combo box when the list box or combo box is destroyed or when items are removed by the LB_DELETESTRING, LB_RESETCONTENT, CB_DELETESTRING, or CB_RESETCONTENT message. The system sends a WM_DELETEITEM message for each deleted item. The system sends the WM_DELETEITEM message for any deleted list box or combo box item with nonzero item data.

.

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.

///     <br />To obtain the exact length of the text, use the WM_GETTEXT, LB_GETTEXT, or CB_GETLBTEXT messages, or the

.

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.

    ///   lParam-A pointer to the null-terminated string that is to be added. If the list box has an owner-drawn style but not the LBS_HASSTRINGS style, this parameter is stored as item data instead of a string. You can send the LB_GETITEMDATA and LB_SETITEMDATA messages to retrieve or modify the item data.

.

    ///   Return value-The return value is the zero-based index of the string in the list box. If an error occurs, the return value is LB_ERR. If there is insufficient space to store the new string, the return value is LB_ERRSPACE.

.

    LB_ADDSTRING = 0x0180,

.

    ///   Return Value-If an error occurs, the return value is LB_ERR.

.

    LB_SETSEL = 0x0185,

.

    ///  Return-The return value is the number of items placed in the buffer. If the list box is a single-selection list box, the return value is LB_ERR.

.

    LB_GETSELITEMS = 0x0191,

.

    ///   Return Value-The return value is the count of selected items in the list box. If the list box is a single-selection list box, the return value is LB_ERR.

.

    LB_GETSELCOUNT = 0x0190,

.

    ///   Return Value-In a single-selection list box, the return value is the zero-based index of the currently selected item. If there is no selection, the return value is LB_ERR.

.

    LB_GETCURSEL = 0x0188,

.

    ///   Return Value If the search is successful, the return value is the index of the selected item. If the search is unsuccessful,LB_ERR

.

    LB_SELECTSTRING = 0x018C,

.

    LB_SETCURSEL = 0x0186,

.

    ///  Return Value-The return value is the index of the matching item, or LB_ERR if the search was unsuccessful.

.

    LB_FINDSTRING = 0x018F,

.

    ///   The return value is the number of items in the list box, or LB_ERR if an error occurs

.

    LB_GETCOUNT = 0x018B,

.

    ///  Return Value-If an item is selected, the return value is greater than zero; otherwise, it is zero. If an error occurs, the return value is LB_ERR.

.

    LB_GETSEL = 0x0187,

.

    LB_GETTEXT = 0x0189,

.

    LB_RESETCONTENT = 0x0184,

.

    LB_SETHORIZONTALEXTENT = 0x0194,

.

    LB_GETHORIZONTALEXTENT = 0x0193,

.

    LB_GETTOPINDEX = 0x018E,

.

    LB_SETTOPINDEX = 0x0197,

.

    /// Inserts a string or item data into a list box. Unlike the LB_ADDSTRING

.

    /// message, the LB_INSERTSTRING message does not cause a list with the

.

    LB_INSERTSTRING = 0x0181,

.

    LB_DELETESTRING = 0x0182,

.

    LB_GETITEMDATA = 0x0199

.

    '   lParam-A pointer to the null-terminated string that is to be added. If the list box has an owner-drawn style but not the LBS_HASSTRINGS style, this parameter is stored as item data instead of a string. You can send the LB_GETITEMDATA and LB_SETITEMDATA messages to retrieve or modify the item data.

.

    '   Return value-The return value is the zero-based index of the string in the list box. If an error occurs, the return value is LB_ERR. If there is insufficient space to store the new string, the return value is LB_ERRSPACE.    

.

    LB_ADDSTRING = &H180

.

    '   Return Value-If an error occurs, the return value is LB_ERR.

.

    LB_SETSEL = &H185

.

    '  Return-The return value is the number of items placed in the buffer. If the list box is a single-selection list box, the return value is LB_ERR.    

.

    LB_GETSELITEMS = &H191

.

    '   Return Value-The return value is the count of selected items in the list box. If the list box is a single-selection list box, the return value is LB_ERR.    

.

    LB_GETSELCOUNT = &H190

.

    '   Return Value-In a single-selection list box, the return value is the zero-based index of the currently selected item. If there is no selection, the return value is LB_ERR.    

.

    LB_GETCURSEL = &H188

.

    '   Return Value If the search is successful, the return value is the index of the selected item. If the search is unsuccessful,LB_ERR

.

    LB_SELECTSTRING = &H18C

.

    LB_SETCURSEL = &H186

.

    '  Return Value-The return value is the index of the matching item, or LB_ERR if the search was unsuccessful.    

.

    LB_FINDSTRING = &H18F

.

    '   The return value is the number of items in the list box, or LB_ERR if an error occurs    

.

    LB_GETCOUNT = &H18B

.

    '  Return Value-If an item is selected, the return value is greater than zero; otherwise, it is zero. If an error occurs, the return value is LB_ERR.    

.

    LB_GETSEL = &H187

.

    LB_GETTEXT = &H189

.

    LB_RESETCONTENT = &H184

.

    LB_SETHORIZONTALEXTENT = &H194

.

    LB_GETHORIZONTALEXTENT = &H193

.

    LB_GETTOPINDEX = &H18E

.

    LB_SETTOPINDEX = &H197

.

    ' Inserts a string or item data into a list box. Unlike the LB_ADDSTRING

.

    ' message, the LB_INSERTSTRING message does not cause a list with the

.

    LB_INSERTSTRING = &H181

.

    LB_DELETESTRING = &H182

.

    LB_GETITEMDATA = &H199

.

    /// Sent to the owner of a list box or combo box when the list box or combo box is destroyed or when items are removed by the LB_DELETESTRING, LB_RESETCONTENT, CB_DELETESTRING, or CB_RESETCONTENT message. The system sends a WM_DELETEITEM message for each deleted item. The system sends the WM_DELETEITEM message for any deleted list box or combo box item with nonzero item data.

.

    '''Sent to the owner of a list box or combo box when the list box or combo box is destroyed or when items are removed by the LB_DELETESTRING LB_RESETCONTENT CB_DELETESTRING or CB_RESETCONTENT message. The system sends a WM_DELETEITEM message for each deleted item. The system sends the WM_DELETEITEM message for any deleted list box or combo box item with nonzero item data.