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#1 Posted : Wednesday, November 5, 2008 11:24:23 AM(UTC)


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Posts: 3

Hi, I'm having troubling using the L_ScreenCaptureBitMap function for LeadTools v16. Before I purchased LeadTools 16, my program worked with the LeadTools v15 Evaluation version....but for some reason, I get ERROR_INVALID_STRUCT_SIZE return value when calling the function. Below is a section of my code....I have been looking at this code for hours and still don't know why I'm getting this error code. It states in the LeadTools API, not to allocate the BITMAPHANDLE struct since the function does that......

int retVal;
char* file = new char[fileName.GetLength() + 1];
strcpy(file, fileName);

CDC* dcScreen = GetDC();
HDC hdcScreen = dcScreen->GetSafeHdc();


RECT rect;
rect.left = xOffset;
rect.top = yOffset;
rect.right = xOffset + graphSize.cx;
rect.bottom = yOffset + graphSize.cy;

retVal = L_ScreenCaptureBitmap(hdcScreen, &hBmp, sizeof(BITMAPHANDLE), &rect);

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#2 Posted : Thursday, November 6, 2008 3:55:47 AM(UTC)

Qasem Lubani  

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Posts: 3,022

Was thanked: 2 time(s) in 2 post(s)

The BITMAPHANDLE structure was not being initialized to zero. You can do that in one of two ways:

BITMAPHANDLE BitmapHandle = {0}; //Qasem1 : set to zeroes

memset(&BitmapHandle, 0, sizeof(BITMAPHANDLE)); //Qasem2 : or this

You should ALWAYS initialize all structure members to zero (and also all pointers to NULL) as a good programming practice, which has no significant impact on program size or speed.
#3 Posted : Thursday, November 6, 2008 9:48:49 AM(UTC)


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Posts: 3

Its old legacy code.....but what you suggested does not work.....I still get the same error code number...... Has there been any changes to the L_ScreenCaptureBitmap function from version 15 to version 16......since the code worked in 15.
#4 Posted : Friday, November 7, 2008 6:30:58 AM(UTC)


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Posts: 3

I fixed the problem on my own.....but thanks for the replies anyway.......
#5 Posted : Saturday, May 23, 2009 10:19:25 AM(UTC)


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Posts: 3

How about you fill in the other people that have the same or similar issue with how you solved your problem...
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