Question

我有50台中的一台计算机从SetProcessDpiAwareness返回非零结果，我找不到任何关于它的信息。我正在设置DPI意识到不知道。我有一台计算机返回值105621835743232（十进制）。它似乎仍然将DPI意识设置为不应该意识到它应该但是会给出一个不期望的返回值。

Private Declare Function SetProcessDpiAwareness Lib "shcore.dll" (ByVal Value As PROCESS_DPI_AWARENESS) As Long

Private Function SetDPI() As Long
    'Results from SetProcessDPIAwareness
    'Const S_OK = &H0&
    'Const E_INVALIDARG = &H80070057
    'Const E_ACCESSDENIED = &H80070005
    Dim lngResult As Long
    lngResult = SetProcessDpiAwareness(PROCESS_DPI_AWARENESS.Process_DPI_Unaware)
    Return lngResult

End Function

这是一个clickonce winforms应用程序，因此我无法使用清单来设置DPI。

非常欢迎任何有关查找文档的帮助！

提前致谢。

Answer 1

This API function's return value is a 32 bit integer so you should use Integer rather than Long. Note that Long is a 64 bit type.

I also strongly recommend using p/invoke rather than Declare. The latter exists for compatibility reasons. P/invoke offers much greater control of the import process.

未知的SetProcessDpiAwareness错误结果

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