Error C2664: 'auxDIBImageLoadW' : cannot convert parameter 1 from 'LPSTR' to 'LPCWSTR' - c++

Question

I was just modifying the code after reinstalling windows and VS 2012 Ultimate. The code (shown below) works perfectly fine before, but when I try to run the code right now, it gives following errors:
Error 1 error C2664: 'auxDIBImageLoadW' : cannot convert parameter 1 from 'LPSTR' to 'LPCWSTR'
Code:
void CreateTexture(GLuint textureArray[], LPSTR strFileName, int textureID)
{
AUX_RGBImageRec *pBitmap = NULL;
if (!strFileName) // Return from the function if no file name was passed in
return;
pBitmap = auxDIBImageLoad(strFileName); //<-Error in this line // Load the bitmap and store the data
if (pBitmap == NULL) // If we can't load the file, quit!
exit(0);
// Generate a texture with the associative texture ID stored in the array
glGenTextures(1, &textureArray[textureID]);
// This sets the alignment requirements for the start of each pixel row in memory.
// glPixelStorei (GL_UNPACK_ALIGNMENT, 1);
// Bind the texture to the texture arrays index and init the texture
glBindTexture(GL_TEXTURE_2D, textureArray[textureID]);
// Build Mipmaps (builds different versions of the picture for distances - looks better)
gluBuild2DMipmaps(GL_TEXTURE_2D, 3, pBitmap->sizeX, pBitmap->sizeY, GL_RGB, GL_UNSIGNED_BYTE, pBitmap->data);
// Lastly, we need to tell OpenGL the quality of our texture map. GL_LINEAR is the smoothest.
// GL_NEAREST is faster than GL_LINEAR, but looks blochy and pixelated. Good for slower computers though.
// Read more about the MIN and MAG filters at the bottom of main.cpp
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
// glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_NEAREST);
// glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_NEAREST);
// Now we need to free the bitmap data that we loaded since openGL stored it as a texture
if (pBitmap) // If we loaded the bitmap
{
if (pBitmap->data) // If there is texture data
{
free(pBitmap->data); // Free the texture data, we don't need it anymore
}
free(pBitmap); // Free the bitmap structure
}
}
I tried this Link, This one too and also Tried this one too. but still getting error.
This function is used after initialization as:
LPCWSTR k =L"grass.bmp";
CreateTexture(g_Texture, "building1.bmp", 0);
CreateTexture(g_Texture, "clock.bmp", 0);
//list goes on
Can you help me out?

Answer 1

Change "LPSTR strFileName" to "LPCWSTR strFileName", "building1.bmp" to L"building1.bmp and "clock.bmp" to L"clock.bmp".
Always be careful because LPSTR is ASCII and LPCWSTR is Unicode. So if the function needs a Unicode variable (like this: L"String here") you can't give it a ASCII string.

Answer 2

The solutions are either:
Change your function prototype to take wide strings:
void CreateTexture(GLuint textureArray[], LPWSTR strFileName, int textureID)
//...
LPCWSTR k =L"grass.bmp";
CreateTexture(g_Texture, L"building1.bmp", 0);
CreateTexture(g_Texture, L"clock.bmp", 0);
or
Don't change your function prototype, but call the A version of the API function:
pBitmap = auxDIBImageLoadA(strFileName);
Recommended: Stick to wide strings and use the correct string types.