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声明：
Public Declare Function SendMessageLong Lib _ "user32" Alias "SendMessageA" (ByVal hwnd As Long, _ ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
Public Const EM_GETLINECOUNT = &HBA
使用：
lineCount = SendMessageLong(Text1.hwnd, EM_GETLINECOUNT, 0&, 0&)
Public Declare Function SendMessageLong Lib _ "user32" Alias "SendMessageA" (ByVal hwnd As Long, _ ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
Public Const EM_GETLINECOUNT = &HBA
使用：
lineCount = SendMessageLong(Text1.hwnd, EM_GETLINECOUNT, 0&, 0&)
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