EndUpdateResource .. failed to add resource to a file but no error was returned.

Posted on 2008-10-06
Medium Priority
Last Modified: 2013-11-26
When I call beginupdateresource updateresource. endupdateresource to add several large data (some times over 400.000.000 bytes)
   1. each uses it's own resource id number
   2. use the same szType
   to  myfile.exe
The finished product does not always contain all the resources. Some time it will missing some resource
but there is no error ever generated when the resource is building.
Just wonder is there a limit on the resource file size ?
Is it possible to break up the data into smaller chuck but can still be read and share the same resource id ?

the szType is defined as "resfiles"
      hUpdateRes = BeginUpdateResource("myfile.exe", FALSE);
	if (hUpdateRes == NULL) 
		error =GetLastError());
		return FALSE;
	result = UpdateResource(hUpdateRes,			// update resource handle 
		szType,			// resource type to change
		MAKEINTRESOURCE(nID),			// resource id to change
		srcData,                   // ptr to resource info 
		dwSize); // size of resource info.
	if (result == FALSE) 
		error =GetLastError());
		return FALSE;
	if (!EndUpdateResource(hUpdateRes, FALSE))
	{ 	error =GetLastError()); 
		return FALSE;		

Open in new window

Question by:willywillycat
  • 5
LVL 39

Expert Comment

ID: 22664786
MSDN says for UpdateResource:

Pointer to the resource data to be inserted into the executable file. If the resource is one of the predefined types, the data must be valid and properly aligned. Note that this is the raw binary data stored in the executable file, not the data provided by LoadIcon,LoadString, or other resource-specific load functions. All data containing strings or text must be in Unicode format; lpData must not point to ANSI data.

I wonder whether your texts added were UNICODE as required. I also wonder whether it is zero-terminated strings as it was required as well.

Can you tell why you need to store data in the resource part of an executable? Actually the UpdateResource wasn't made for runtime-updates but for editing the resources of an executable after built, e. g. for language customization, not needing to relink the executable.

Author Comment

ID: 22689352
The files that I am trying to add are 2 zip files. 1 with size of 280000kb and the other 405000kb which are all binary format.
On both of my test machines which has 2 G memory and 30G empty disk space won't.
No idea as why. I defreg my machines and increased page size to 4096Kb and still not being able to.
Seems the endupdateresource will add only 1 file for me,  and the 2nd file will not. No error message were returned for getlasterror() and return value of function indicating a success.

Accepted Solution

willywillycat earned 0 total points
ID: 22797044
problem not resolved.
Train for your Pen Testing Engineer Certification

Enroll today in this bundle of courses to gain experience in the logistics of pen testing, Linux fundamentals, vulnerability assessments, detecting live systems, and more! This series, valued at $3,000, is free for Premium members, Team Accounts, and Qualified Experts.


Author Comment

ID: 22797049
problem not resolved

Author Comment

ID: 22797050
problem not resolved

Author Comment

ID: 22797077
problem not resolved

Featured Post

Keep up with what's happening at Experts Exchange!

Sign up to receive Decoded, a new monthly digest with product updates, feature release info, continuing education opportunities, and more.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Ready to get certified? Check out some courses that help you prepare for third-party exams.
Native ability to set a user account password via AD GPO was removed because the passwords can be easily decrypted by any authenticated user in the domain. Microsoft recommends LAPS as a replacement and I have written an article that does something …
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
From store locators to asset tracking and route optimization, learn how leading companies are using Google Maps APIs throughout the customer journey to increase checkout conversions, boost user engagement, and optimize order fulfillment. Powered …

627 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question