@msdn=http://search.microsoft.com/search/results.aspx?qu=$$$ @pinvoke=http://pinvoke.net/$$$.htm Summary: TODO - a short description !!!!C# Signature: [DllImport("winhttp.dll", SetLastError=true)] static extern bool WinHttpQueryDataAvailable( IntPtr hRequest, ref UInt32 lpdwNumberOfBytesAvailable ); !!!!VB Signature: Declare Function WinHttpQueryDataAvailable Lib "winhttp.dll" (ByVal hRequest As IntPtr, ByRef lpdwNumberOfBytesAvailable As Integer) As Boolean !!!!User-Defined Types: None. !!!!Alternative Managed API: Do you know one? Please contribute it! !!!!Notes: I tested this method in sync method, it is ok. But according to MSDN and C++ code, the second param should be NULL when use async method. This function cann't work. !!!!Tips & Tricks: Please add some! !!!!Sample Code: Please add some! Documentation: WinHttpQueryDataAvailable@msdn on MSDN
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