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951 :: How can I create a string buffer that can be used with windows API?

• kemege (orginal) [2015-03-02T09:38:33+01:00] view original

  for example, there is GetWindowTextW if I import windows

  
    proc GetWindowTextW*(wnd: HWND, lpString: LPWSTR, nMaxCount: int32): int32{.stdcall, dynlib: "user32", importc: "GetWindowTextW".}
  Run

  this function takes an output argument lpString, whose type is LPWSTR in Python there is ctypes.create_unicode_buffer to create such a buffer.

  How can I do it in Nim?

  Besides, when I compile it, should I add the -d:winUnicode parameter?

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• oswjk (orginal) [2015-03-02T14:36:39+01:00] view original

  I do something like this:

  var buf = newWideCString("", 4096)
  var len = GetWindowTextW(window, cast[LPWSTR](addr buf[0]), 4096)
  Run

  But I'm not sure if this is the best way. Certainly not the only way.

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• kemege (orginal) [2015-03-04T04:27:18+01:00] view original

  Thank you for your reply.

  I was using a uint16 array since I didn't know the how to cast a type into another. Your way is much cleaner than mine ::)

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