Is it plousable MemDC to BitMap?

[MR.Hotdog]

Hello, I am having a problem with a code I wrote.
As an expansion to a program I need to draw an bitmap and return the bitmap (im making an DLL)

I am new to this and never workt with bitmaps bevore. I dit mix 2 tutorials 1 for loading a bitmap from a file and saving it to a MemD and print it to the window ussing BitBlt

the second tutorial was drawing to a DC.

So wat I dit (not knowing how wrong I was) load a dummy 256x256 bitmap file,
putting it in to a MemDC then I was drawing to the MemDC
and I was testing the program ussing BitBlt and workt perfect.
But then it wend wrong in the program that has to usse the bitmap.
Becorse all the drawing was on the MemDC itself not on the bitmap, and the code is as long as an sheet of wallpaper, so rewriting it will take ages (not to vorget I dont know how to draw on bitaps)

so is ther a way I can usse this

HBITMAP Bitmap_To_Return = CreateBitmap(xxxxxxxx);
and then save the MemDC to Bitmap_To_Return

so I dont have to rewrite all the code


Thanks,

[D_Drmmr]

That's exactly what you do with a memory DC. You select the bitmap in the DC and then draw on the DC. This paints on the bitmap.

[MR.Hotdog]

That's exactly what you do with a memory DC. You select the bitmap in the DC and then draw on the DC. This paints on the bitmap.

Here is a part of my code:

#define export extern "C" __declspec (dllexport)
export HANDLE Generate_map(HDC hDC , const char* ini_name, const char* bin_name ,int _X , int _Y)
{ 
	     BMAP = LoadImage ( NULL,(LPCWSTR)L"MapGen\\Preview.bmp", IMAGE_BITMAP, 0, 0,LR_LOADFROMFILE );
		      
	   	
	    // bitmaps can only be selected into memory dcs:
		HDC dcmem = CreateCompatibleDC ( NULL );
        
       if ( NULL == SelectObject ( dcmem, BMAP ) )
	{	// failed to load bitmap into device context
		DeleteDC ( dcmem ); 
		return false; 
	}

SetPixel(dcmem,5   ,5 , RGB(128,128,128)); // ther is a loth of drawing going on but its all setpixel

	/*
        BITMAP bm;
	GetObject ( BMAP, sizeof(bm), &bm );
	
	
    // and blit it to the visible dc
	if ( BitBlt ( hDC, _X, _Y, bm.bmWidth, bm.bmHeight, dcmem,0, 0, SRCCOPY ) == 0 ){DeleteDC ( dcmem );return NULL; }	// failed the blit
	 */
	 


	
		return BMAP;
}

now when I use the DLL to export BMAP with the drawings on it
but the only thing the test program draws is “MapGen\\Preview.bmp”

but when I enable the code between /* */ then I get the correct bitmap display but the dll draws it to the program,

the program I write it for needs the index of the bitmap as an
HBITMAP, HANDLE, or an byte array