Clarification on the nFlags Parameter Default Value for PrintWindow Function

Yucheng Song 41 Reputation points
2024-03-08T13:39:02.4733333+00:00

Hello Community,

I am currently working with the PrintWindow function for a Windows desktop application test and I came across a question regarding the nFlags parameter. I understand that this parameter can be used with the PW_CLIENTONLY flag to capture only the client area of the window. However, the documentation does not explicitly state whether the nFlags parameter can be set to 0 to indicate the default behavior, which captures the entire window.

Could someone please confirm if setting the nFlags parameter to 0 is equivalent to not specifying any drawing options and thus defaults to capturing the full window content? Additionally, is there any official documentation that clarifies this behavior, or perhaps some best practices when using PrintWindow without any flags?

Thank you in advance for your assistance!

Best regards,

Yucheng Song

Windows 10
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  1. Castorix31 81,746 Reputation points
    2024-03-08T14:35:29.8766667+00:00

    The doc says "By default, the entire window is copied."

    So if you set 0, PW_CLIENTONLY is not set and PrintWindow calls GetWindowRect instead of GetClientRect

    The other useful flag is PW_RENDERFULLCONTENT

    1 person found this answer helpful.

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