[x]
Posted via EE Mobile

Search, ask, and monitor your questions on the go with EE Mobile. Visit Experts Exchange from your mobile device and never be out of touch again.

Question
[x]
Attachment Details
[x]
The Solution Rating System

With so many solutions, how can you tell which solutions are most likely to help you and which ones are not? To provide you with a tool to use, we rate our solutions based on various elements that most accurately determine if a solution is a quality solution. To explain what factors affect the solution rating, here are the elements we take into consideration when formulating our solution rating.

  • The Grade of the Solution
  • The Zone Rank of the Expert Providing the Solution
  • The Number of Author and Expert Comments
  • The Number of Experts Contributing
  • The Feedback of the Community

Your Input Matters
Because of the way the system is set up, the most important variable in this equation is you. As a member of Experts Exchange, you are able to cast your vote on the quality of the solutions in regard to how complete, accurate, helpful and easy to understand each solution is. When you provide your feedback, each rating is adjusted accordingly. So, if you see a solution that has a poor rating that you think is a good solution, let us know by rating it. As you do, the rating will be adjusted and will become more accurate for other members of our site.

If you have any suggestions that you would like to make for our rating system, please ask a question in the Suggestions Zone of Community Support.

Thank you!

9.2

SetupApi - can't get SetupDiGetDeviceRegistryProperty() to work

Asked by DaFox in Delphi Programming

Tags: setupdigetdeviceregistryproperty

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
[+][-]09/13/03 10:04 PM, ID: 9355842Accepted Solution

View this solution now by starting your 30-day free trial. Setting up your free trial is quick, easy, and secure. We will return you to this solution, unlocked, when you're done.

About this solution

Zone: Delphi Programming
Tags: setupdigetdeviceregistryproperty
Sign Up Now!
Solution Provided By: robert_marquardt
Participating Experts: 1
Solution Grade: A
 
[+][-]09/22/03 06:00 PM, ID: 9409835Author Comment

Often, when Experts are collaborating with members who have asked questions, they will request additional information about the problem. Askers respond with an author comment like this one.

Start your 30-day free trial to view this Author Comment or ask the Experts your question.

 
 
Loading Advertisement...
20091111-EE-VQP-89