[rcore] add 'GetClipboardImage' for windows

examples/core/core_clipboard_image.c

@@ -0,0 +1,34 @@
+#include "raylib.h"
+#include <stdio.h>
+#include <stdlib.h>
+
+static Image img = {0};
+int main(int argc, char *argv[]) {
+
+    InitWindow(800, 450, "[core] raylib clipboard image");
+    SetTraceLogLevel(LOG_TRACE);
+    SetTargetFPS(60);
+
+    Texture tex = {0};
+    while(!WindowShouldClose()) {
+        if (IsKeyDown(KEY_LEFT_CONTROL) && IsKeyPressed(KEY_V)) {
+            #ifdef _WIN32
+            img = GetClipboardImage();
+            tex = LoadTextureFromImage(img);
+            if(!IsTextureValid(tex)) {
+                exit(98);
+            } else {
+                ExportImage(img, "Debug.bmp");
+            }
+            #endif
+        }
+
+        BeginDrawing();
+            ClearBackground(RAYWHITE);
+            if (IsTextureValid(tex)) {
+                DrawTexture(tex, 0, 0, WHITE);
+            }
+            DrawText("Print Screen and Crtl+V", 10, 10, 21, BLACK);
+        EndDrawing();
+    }
+}