LoadImage from resource failure

[colin glenn]

I've got a bitmap image in my resource file which I want to load into memory by handle, so far I've not met with success, and to make matters annoying, the debugger will crash when encountering the LoadImage line. Tried going the FindResource and LoadResource route, but they also generate a:

Exception: Memory Access Violation
Program tried to read or write an invalid memory address
End Debug at 12:47:50 PM on 2/14/2009

on me. Note: GRAPHIC BITMAP LOAD iName, 20,20 TO hBitmap works just peachy. But is not what I need, I actually need the PALETTE of said image. Also, LoadBitmap fails with the Memory Access Violation as well. Running the program compiled, I get back 0 when using a message box to display the results of the various load attempts.

[colin glenn]

I'm sorry, should be including reference code for what I'm doing.

In my RC file I have:

IDR_POSITIONTILE    BITMAP DISCARDABLE "images\floor0137.bmp"

So that in my main program I can:

$POSITIONTILE                   = "IDR_POSITIONTILE"

And then I'm supposed to be able to load it with:

LOCAL iName AS ASCIIZ * 80
LOCAL hBitmap, fResource, hResource, lResource AS DWORD
iName = $POSITIONTILE
GRAPHIC BITMAP LOAD iName, 20,20 TO hBitmap
MSGBOX "Graphic Bitmap Load Success = "& FORMAT$(hBitmap)
' returns the ID for the Graphic Control

hBitmap = LoadImage(CB.HNDL, iName, %IMAGE_BITMAP, 0, 0, %LR_CREATEDIBSECTION)
' dies in debugger

MSGBOX "Load Image Success = "& FORMAT$(hBitmap)
' returns 0 in compiled

hBitmap = LoadBitmap(CB.HNDL, iName)
' dies in debugger

MSGBOX "Load Bitmap Success = "& FORMAT$(hBitmap)
' returns 0 in compiled

fResource = FindResource(0, iName, BYVAL %RT_BITMAP)
IF ISTRUE fResource THEN
    hResource = LoadResource(CB.HNDL, fResource)
    ' dies in debugger

    MSGBOX "Load Resource Success " & FORMAT$(hResource)
    ' a duh on fResource, ISTRUE permitted entry to this point
    ' returns 0 in compiled

    IF ISTRUE hResource THEN
    END IF
END IF

[Edwin Knoppert]

CB.HNDL ??

You'll need the instance handle.
Use WINMAIN instead of PBMAIN to get the hInstance handle.

[Chris Holbrook]

CB.HNDL ??

You'll need the instance handle.
Use WINMAIN instead of PBMAIN to get the hInstance handle.

or getmodulehandle(byval 0)?

[José Roca]

Or use GetModuleHandle("") instead of CB.HNDL.

[colin glenn]

Thank you.
I just knew I was overlooking something terribly simple.

[Lot Yong]

thx,Is required.

[Michael Mattias]

This is a good demo for, "always test the success of an operation e.g., (hBitmap <> %NULL) and stop executing after something has failed."

Continuing after an error is how GPFs happen.

The original code in post #1 tested (Good!) but didn't stop when a failure occurred (GPF!)

[colin glenn]

Michael, the GPF was occurring when the attempt was being made to gain a handle for the resource, initially, when writing the chunk of code, I was using the wrong value to the API to get a handle for the resource, so it died on the API call itself while in the debugger, no means to test validity. In the runtime, there was checks for validity, however, I stripped them all out in constructing my test scenerio.