ReturnPixel function alwyas returns false

[Roboticguy2]

I have a function which, when called, is supposed to return TRUE if the pixel in the filename specified is black, of FALSE if white. The problem if that the function always returns false. Here's the code.

BOOL returnpixel(char* fileName,int x, int y, HWND hwnd)
{
BOOL returnValue = TRUE;
HBITMAP letterTest = NULL;
HDC hdc;
letterTest = LoadImage(GetModuleHandle(NULL),fileName, IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE | LR_CREATEDIBSECTION);
if(letterTest=NULL)
MessageBox(NULL, "Unable to load file!", "Error", MB_OK);
HDC hdcMem = CreateCompatibleDC(hdc);
HBITMAP hbmOld=SelectObject(hdcMem,letterTest);
COLORREF letterColor = GetPixel(hdcMem,x,y);
if(GetRValue(letterColor) == 0 && GetGValue(letterColor) == 0 && GetBValue(letterColor) == 0)
returnValue = TRUE;
if(GetRValue(letterColor) == 255 && GetGValue(letterColor) == 255 && GetBValue(letterColor) == 255)
returnValue = FALSE;
SelectObject(hdcMem,hbmOld);
DeleteObject(letterTest);
DeleteDC(hdc);
return returnValue;
}

 

[Cagliostro]

it meane this piece of code:
(GetRValue(letterColor) == 255 && GetGValue(letterColor) == 255 && GetBValue(letterColor) == 255)
always is evaluted as true. All you should do is to see why...

Ion Filipski

 

[Roboticguy2]

Exactly, I thought that was the problem, but I don't know how to fix it. I've already checked to see if the image was loading correctly, but that wasn't the case. The image also has some black in it, so it can't be that.