INFO: Using cout in an Application and DLL

Last reviewed: September 30, 1997
Article ID: Q101185

The information in this article applies to:

Microsoft Visual C++ for Windows, versions 1.0, 1.5
Microsoft Visual C++ 32-bit Edition, versions 1.0, 2.0, 4.0, 5.0

The standard output stream (cout) can be used in an application or dynamic- link library (DLL) to display information. When using cout in an application and a DLL simultaneously, special care is needed to ensure that the text display is synchronized.

Because the cout text stream is buffered, text from a DLL may not appear correct relative to text from the application. To correct this problem, always use the endl manipulator when outputting text with cout. Below is an example:

   cout << "Hello World" << endl;

The endl manipulator inserts a newline character and then flushes the stream buffer. This ensures that text displayed from the application and DLL is synchronized.

Keywords          : CPPLngIss
Version           : WINDOWS:1.0,1.5;WINDOWS NT:1.0,2.0,4.0,5.0;
Platform          : NT WINDOWS
Issue type        : kbinfo

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Last reviewed: September 30, 1997
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