wing32: Add tests.

configure

@@ -22440,6 +22440,7 @@ wine_fn_config_makefile dlls/winex11.drv enable_winex11_drv
 wine_fn_config_makefile dlls/winexinput.sys enable_winexinput_sys
 wine_fn_config_makefile dlls/wing.dll16 enable_win16
 wine_fn_config_makefile dlls/wing32 enable_wing32
+wine_fn_config_makefile dlls/wing32/tests enable_tests
 wine_fn_config_makefile dlls/winhttp enable_winhttp
 wine_fn_config_makefile dlls/winhttp/tests enable_tests
 wine_fn_config_makefile dlls/wininet enable_wininet

configure.ac

@@ -3257,6 +3257,7 @@ WINE_CONFIG_MAKEFILE(dlls/winex11.drv)
 WINE_CONFIG_MAKEFILE(dlls/winexinput.sys)
 WINE_CONFIG_MAKEFILE(dlls/wing.dll16,enable_win16)
 WINE_CONFIG_MAKEFILE(dlls/wing32)
+WINE_CONFIG_MAKEFILE(dlls/wing32/tests)
 WINE_CONFIG_MAKEFILE(dlls/winhttp)
 WINE_CONFIG_MAKEFILE(dlls/winhttp/tests)
 WINE_CONFIG_MAKEFILE(dlls/wininet)

dlls/wing32/Makefile.in

 MODULE    = wing32.dll
+IMPORTLIB = wing32
 IMPORTS   = user32 gdi32
 
 SOURCES = \

dlls/wing32/tests/Makefile.in

+TESTDLL = wing32.dll
+IMPORTS = wing32 gdi32
+
+SOURCES = \
+	wing32.c

dlls/wing32/tests/wing32.c

+/*
+ * Unit test suite for wing32 functions
+ *
+ * Copyright 2024 Bernhard Übelacker
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#include <windows.h>
+
+#include "wine/test.h"
+
+HDC WINAPI WinGCreateDC(void);
+HBITMAP WINAPI WinGCreateBitmap(HDC, BITMAPINFO*, void **);
+void* WINAPI WinGGetDIBPointer(HBITMAP, BITMAPINFO*);
+
+static void test_WinGGetDIBPointer(void)
+{
+    HDC dc;
+    BITMAPINFO bmi;
+    void *bits;
+    HBITMAP bmp;
+    void* dib;
+
+    dc = WinGCreateDC();
+    ok(dc != NULL, "WinGCreateDC failed\n");
+
+    memset(&bmi, 0, sizeof(bmi));
+    bmi.bmiHeader.biSize = sizeof(bmi.bmiHeader);
+    bmi.bmiHeader.biWidth = 1;
+    bmi.bmiHeader.biHeight = 1;
+    bmi.bmiHeader.biPlanes = 1;
+    bmi.bmiHeader.biBitCount= 24;
+    bmi.bmiHeader.biCompression= BI_RGB;
+    bmi.bmiHeader.biSizeImage = 0;
+    bmp = WinGCreateBitmap(dc, &bmi, &bits);
+    ok(bmp != NULL, "WinGCreateBitmap failed\n");
+
+    dib = WinGGetDIBPointer(NULL, NULL);
+    ok(dib == NULL, "WinGGetDIBPointer returned unexpected value %p\n", dib);
+
+    dib = WinGGetDIBPointer(bmp, &bmi);
+    ok(dib != NULL, "WinGGetDIBPointer failed\n");
+
+    DeleteObject(bmp);
+    DeleteDC(dc);
+}
+
+START_TEST(wing32)
+{
+    test_WinGGetDIBPointer();
+}