Need a clarification using jni

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C

Java

JNI

DLL

JVM

I am using this as a reference to call my java class inside C program. But , JVM is not launching. Here is my code for launching jvm.

<JNIEnv* create_vm(JavaVM** jvm)
{
    JNIEnv* env;
    JavaVMInitArgs vm_args;
    JavaVMOption options;
    HMODULE jvm_dll=NULL;
    int ret;

    options.optionString = "C:\\Test\\src\\main\\java"; //Path to the java source code
    vm_args.version = JNI_VERSION_1_6; //JDK version. This indicates version 1.6
    vm_args.nOptions = 1;
    vm_args.options = &options;
    vm_args.ignoreUnrecognized = 0;
    char t[400];
    mbstowcs(t, "C:\\Program Files (x86)\\Java\\jdk-16.0.1\\jre\\bin\\server\\jvm.dll", 400);
    jvm_dll = LoadLibrary(t);

    /// You might check the GetLastError() here after the LoadLibrary()
    if (jvm_dll == NULL) {
        printf("can't load dll\n");
        printf("error code %d", GetLastError());
    }

    JNI_CreateJavaVM_ptr = (JNI_CreateJavaVM_func)GetProcAddress(jvm_dll, "JNI_CreateJavaVM");

    /// You might check the GetLastError() here
    if (JNI_CreateJavaVM_ptr == NULL) { printf("can't load function\n"); 
    printf("error code %d", GetLastError());
    }

    printf("came here");
    ret = JNI_CreateJavaVM_ptr(jvm, (void**)&env, &vm_args);
    if (ret < 0) 
    { 
    printf("\nUnable to Launch JVM\n");
    printf("error code %d", GetLastError());
    }
    else
    {
        printf("got it"); 
    }
    printf("end");
    return env;
}
int main()
{
    JNIEnv* env;
    JavaVM* jvm;
    env = create_vm(&jvm);
    if (env == NULL)
    {
        printf("Error");
    }
return 0;
}

It throws error 203. But, I have no idea what it means.

What I have tried:

I am using visual studio. I have added jvm.lib to the project properties and also in the path. I don't know if I'm loading the dll correctly. Help me to launch jvm.