Question

SetupApi - can't get SetupDiGetDeviceRegistryProperty() to work

Asked by: DaFox

Hi, folks!

Does somebody of you fellow experts (Robert? ;o) have a working example of how to use the SetupDiGetDeviceRegistryProperty() function?
I can't get it to work, dunno why.... Error Code is 13, what means "The data is invalid."

snippet:

var
  DeviceInfoSet: hDevInfo; // seems to have correct content...
  DeviceInfoData: TSPDevInfoData; // seems to hold correct content either
  dwProperty: DWord; // either SPDRP_DEVICEDESC, SPDRP_CLASS, SPDRP_CLASSGUID, SPDRP_FRIENDLYNAME; nothing works
  Buffer: PByte; // does sometimes contain values returned by SetupDiGetDeviceRegistryProperty, but function fails :-(
  Length: PDWord // always returns nil

// ...

while (not SetupDiGetDeviceRegistryProperty(DeviceInfoSet, DeviceInfoData, dwProperty, nil, Buffer, DWord(length), length)) do
begin
  if (GetLastError() = ERROR_INSUFFICIENT_BUFFER) then
  begin
    // adjust buffer
  end;

// ...

Thats my second project using the SetupAPI and I'm in big trouble again.... seems like SetupAPI doesn't like me...

Thanks in advance for all of your help.

Markus

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Asked On
2003-09-13 at 19:15:08ID20738047
Tags

setupdigetdeviceregistryproperty

Topic

Delphi Programming

Participating Experts
1
Points
125
Comments
2

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Answers

 

by: robert_marquardtPosted on 2003-09-13 at 22:04:20ID: 9355842

My HID component http://www.delphi-gems.com/controls.php uses the function successfully.
Use the SetupApi.pas from that component. The Jedi version is outdated.
You can send me your sources directly and i will have a look.

 

by: DaFoxPosted on 2003-09-22 at 18:00:19ID: 9409835

Hi Robert,

like all of your source codes - very helpful. Thank you!

Markus

PS: Ich glaube ich sollte öfters im Entwickler-Forum fragen, sonst ziehst Du mir noch davon ;)

20120131-EE-VQP-002

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